Metastin derivatives and use thereof

ABSTRACT

The invention provides stable metastin derivatives having excellent biological activities (a cancer metastasis suppressing activity, a cancer growth suppressing activity, etc.). By modifying the constituent amino acids of metastin with specific modifying groups, metastin derivatives having more improved blood stability, etc. than native metastin and showing excellent cancer metastasis suppressing activity or cancer growth suppressing activity have been found. Furthermore, it has been found that these metastin derivatives exhibit effects of suppressing gonadotropic hormone secretion, suppressing sex hormone secretion, etc., which are wholly different from the effects heretofore known.

TECHNICAL FIELD

The present invention relates to metastin derivatives and use thereof.

BACKGROUND ART

Human-derived metastin (also termed KiSS-1 peptide) (WO 00/24890) and rat or mouse-derived metastin (WO 01/75104) are known. Also, sustained released preparations containing metastin are known (WO 02/85399).

Reportedly, metastin has an effect of suppressing cancer metastasis and is therefore effective for preventing or treating cancers (for example, lung cancer, gastric cancer, liver cancer, pancreatic cancer, colorectal cancer, rectal cancer, colonic cancer, prostate cancer, ovarian cancer, cervical cancer, breast cancer, renal cancer, bladder cancer, brain tumor, etc.); metastin also has an effect of controlling pancreatic function and is effective for preventing or treating pancreatic diseases (e.g., acute or chronic pancreatitis, pancreatic cancer, etc.); and metastin further has an effect of controlling placental function and is effective for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or abnormal delivery (WO 00/24890; WO 01/75104; WO 02/85399).

DISCLOSURE OF THE INVENTION

The present invention aims at providing stable metastin derivatives having excellent biological activities (a cancer metastasis suppressing activity, a cancer growth suppressing activity, etc.).

The present inventors have made extensive studies to solve the foregoing problems and as a result, have found that by modifying the amino acids, which constitute metastin, with a specific modifying group, unexpectedly metastin derivative show improved blood stability, etc. as compared to native metastin and further exhibit an excellent cancer metastasis suppressing activity or a cancer growth suppressing activity. The present inventors have further found that unexpectedly these metastin derivatives have an effect of suppressing gonadotropic hormone secretion, an effect of suppressing sex hormone secretion, etc., which are totally different from the effects known so far. Based on these findings, the present inventors have continued further investigations and come to accomplish the present invention.

That is, the present invention provides the following features and so on.

(1) A metastin derivative (II) represented by formula:

[wherein; V represents a group represented by formula:

or a group represented by formula:

n represents 0 or 1;

W¹ represents N, CH or O (provided that when W¹ is N or CH, n represents 1 and when W¹ is O, n represents 0);

W² represents N or CH;

Z¹, Z³, Z⁵ and Z⁷ each represents hydrogen atom or a C₁₋₃ alkyl group;

Z⁴, Z⁶ and Z⁸ each represents hydrogen atom, O or S;

R² represents (1) hydrogen atom or (2) a cyclic or linear C₁₋₁₀ alkyl group, (3) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (4) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group;

R³ represents (1) a C₁₋₈ alkyl group having an optionally substituted basic group and optionally having an additional substituent, (2) an aralkyl group having an optionally substituted basic group and optionally having an additional substituent, (3) a C₁₋₄ alkyl group having a non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent, or (4) a C₁₋₄ alkyl group having a non-aromatic heterocyclic group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent;

R⁴ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7;

Q¹ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7;

Q² represents (1) CH₂, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, (2) NH, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, or (3) O;

Y represents a group represented by formula: —CONH—, —CSNH—, —CH₂NH—, —NHCO—, —CH₂O—, —CH₂S—, —COO—, —CSO—, —CH₂CH₂—, or —CH═CH—, which may optionally be substituted with a C₁₋₆ alkyl group; and,

Z⁹ represents hydrogen atom, O or S; and,

P and P′, which may be the same or different, each may form a ring by combining P and P′ or P and Q¹ together and represents:

(1) hydrogen atom;

(2) an optional amino acid residue continuously or discontinuously bound from the C terminus of the 1-48 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1;

(3) a group represented by formula:

J¹-J²-C(J³)(Q³)Y¹C(J⁴)(Q⁴)Y²C(J¹)(Q¹)Y³C(J⁶)(Q⁶)C(=Z¹⁰)

(wherein:

-   -   J¹ represents (a) hydrogen atom or (b) (i) a C₁₋₁₅ acyl         group, (ii) a C₁₋₁₅ alkyl group, (iii) a C₆₋₁₄ aryl group, (iv)         carbamoyl group, (v) carboxyl group, (vi) sulfino group, (vii)         amidino group, (viii) glyoxyloyl group or (ix) amino group,         which groups may optionally be substituted with a substituent         containing an optionally substituted cyclic group;     -   J² represents (1) NH optionally substituted with a C₁₋₆ alkyl         group, (2) CH₂ optionally substituted with a C₁₋₆ alkyl         group, (3) 0 or (4) S;     -   J³ through J⁶ each represents hydrogen atom or a C₁₋₃ alkyl         group;     -   Q³ through Q⁶ each represents a C₁₋₄ alkyl group, which may         optionally have a substituent selected from the group consisting         of:     -   (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group,     -   (2) an optionally substituted 5- to 14-membered aromatic         heterocyclic group consisting of 1 to 7 carbon atoms and hetero         atoms selected from the group consisting of nitrogen, oxygen and         sulfur atoms,     -   (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group,     -   (4) an optionally substituted 5- to 14-membered aromatic fused         heterocyclic group consisting of 3 to 11 carbon atoms and hetero         atoms selected from the group consisting of nitrogen, oxygen and         sulfur atoms,     -   (5) an optionally substituted non-aromatic cyclic hydrocarbon         group having carbon atoms not greater than 7,     -   (6) an optionally substituted non-aromatic heterocyclic group         having carbon atoms not greater than 7,     -   (7) an optionally substituted amino group,     -   (8) an optionally substituted guanidino group,     -   (9) an optionally substituted hydroxyl group,     -   (10) an optionally substituted carboxyl group,     -   (11) an optionally substituted carbamoyl group, and     -   (12) an optionally substituted sulfhydryl group, or hydrogen         atom;     -   J³ and Q³, J⁴ and Q⁴, J⁵ and Q⁵ or J⁶ and Q⁶ may be combined         together, or, J² and Q³, Y¹ and Q⁴, Y² and Q⁵, or Y³ and, Q⁶ may         be combined together, to form a ring;     -   Y¹ through Y³ each represents a group represented by formula:     -   —CON(J¹³)-, —CSN(J¹³)-, —C(J¹⁴)N(J¹³)- or —N(J¹³)CO— (wherein         J¹³ and J¹⁴ each represents hydrogen atom or a C₁₋₃ alkyl         group); and,     -   Z¹⁰ represents hydrogen atom, O or S);

(4) a group represented by formula:

J¹-J²-C(J⁷)(Q⁷)Y²C(J⁸)(Q⁸)Y³C(J⁹)(Q⁹)C(=Z¹⁰)-

(wherein:

J¹ and J², each has the same significance as described above;

J⁷ through J⁹ have the same significance as for J³;

Q⁷ through Q⁹ have the same significance as for Q³;

Y² and Y³ each has the same significance as described above;

Z¹⁰ has the same significance as described above;

J⁷ and Q⁷, J⁸ and Q⁸ or J⁹ and Q⁹ may be combined together, or, J² and Q⁷, Y² and Q⁸ or Y³ and Q⁹ may be combined together, to form a ring);

(5) a group represented by formula:

J¹-J²-C(J¹⁰)(Q¹⁰)Y³C(J¹¹)(Q¹¹)C(=Z¹⁰)-

(wherein:

J¹ and J² have the same significance as described above represents;

J¹⁰ and J¹¹ have the same significance as for J³;

Q¹⁰ and Q¹¹ have the same significance as for Q³;

Y³ has the same significance as described above;

Z¹⁰ has the same significance as described above; and,

J¹⁰ and Q¹⁰ or J¹¹ and Q¹¹ may be combined together, or J² and Q¹⁰ or Y³ and

Q¹¹ may be combined together, to form a ring);

(6) a group represented by formula:

J¹-J²-C(J¹²)(Q¹²)C(=Z¹⁰)-

(wherein;

J¹ and J² have the same significance as described above;

J¹² has the same significance as for J³;

Q¹² has the same significance as for Q³;

Z¹⁰ has the same significance as described above; and,

J¹² and Q¹² may be combined together, or J² and Q¹² may be combined together, to form a ring); or,

(7) a group represented by formula:

J¹-

(wherein:

J¹ has the same significance as described above)] (provided that a peptide consisting of the amino acid sequence of 1-54, 2-54, 3-54, 4-54, 5-54, 6-54, 7-54, 8-54, 9-54, 10-54, 11-54, 12-54, 13-54, 14-54, 15-54, 16-54, 17-54, 18-54, 19-54, 20-54, 21-54, 22-54, 23-54, 24-54, 25-54, 26-54, 27-54, 28-54, 29-54, 30-54, 31-54, 32-54, 33-54, 34-54, 35-54, 36-54, 37-54, 38-54, 39-54, 40-54, 41-54, 42-54, 43-54, 44-54, 45-54, 46-54, 47-54, 48-54 or 49-54 in the amino acid sequence represented by SEQ ID NO: 1 is excluded), or a salt thereof.

(2) The metastin derivative (II) according to (1), wherein V is a group represented by formula:

(wherein each symbol has the same significance as defined in (1)), or a salt thereof. (3) The metastin derivative (II) according to (1), wherein V is a group represented by formula:

(wherein each symbol has the same significance as defined in (1)), or a salt thereof.

The present invention further provides the following features, and so on.

(4) A prodrug of the metastin derivative (II) according to (1) or a salt thereof. (5) A pharmaceutical comprising the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (6) The pharmaceutical according to (5), which is an agent for suppressing cancer metastasis or an agent for suppressing cancer growth. (7) The pharmaceutical according to (5), which is an agent for preventing or treating cancer. (8) The pharmaceutical according to (5), which is an agent for controlling pancreatic function. (9) The pharmaceutical according to (5), which is an agent for preventing or treating acute or chronic pancreatitis or pancreatic cancer. (10) The pharmaceutical according to (5), which is an agent for controlling placental function. (11) The pharmaceutical according to (5), which is an agent for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery. (12) The pharmaceutical according to (5), which is an agent for improving gonadal function. (13) The pharmaceutical according to (5), which is an agent for preventing or treating hormone-dependent cancer, infertility, endometriosis, early puberty or myoma of the uterus. (14) The pharmaceutical according to (5), which is an agent for inducing or stimulating ovulation. (15) The pharmaceutical according to (5), which is a gonadotropic hormone secretagogue agent or a sex hormone secretagogue agent. (16) The pharmaceutical according to (5), which is an agent for preventing or treating Alzheimer's disease or moderate cognitive impairment. (17) A method for suppressing cancer metastasis or cancer growth, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (18) A method for preventing or treating cancer, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (19) A method for controlling pancreatic function, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (20) A method for preventing or treating acute or chronic pancreatitis or pancreatic cancer, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (21) A method for controlling placental function, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (22) A method for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (23) A method for improving gonadal function, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (24) A method for preventing or treating hormone-dependent cancer, infertility, endometriosis, early puberty or myoma of the uterus, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (25) A method for inducing or stimulating ovulation, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (26) A method for promoting gonadotropic hormone secretion or promoting sex hormone secretion, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (27) A method for preventing or treating Alzheimer's disease or moderate cognitive impairment, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (28) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for suppressing cancer metastasis or an agent for suppressing cancer growth. (29) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating cancer. (30) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for controlling pancreatic function. (31) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating acute or chronic pancreatitis or pancreatic cancer. (32) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for controlling placental function. (33) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery. (34) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for improving gonadal function. (35) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating hormone-dependent cancer, infertility, endometriosis, early puberty or myoma of the uterus. (36) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for inducing or stimulating ovulation. (37) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture a gonadotropic hormone secretagogue agent or a sex hormone secretagogue agent. (38) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating Alzheimer's disease or moderate cognitive impairment. (39) A pancreatic glucagon secretagogue agent comprising the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (40) An agent for promoting urine formation comprising the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (41) An agent for preventing or treating obesity, hyperlipemia, type II diabetes mellitus, hypoglycemia, hypertension, diabetic neuropathy, diabetic nephropathy, diabetic retinopathy, edema, urinary disturbances, insulin resistance, unstable diabetes, fatty atrophy, insulin allergy, insulinoma, arteriosclerosis, thrombotic disorders or lipotoxicity, comprising the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (42) A method for promoting pancreatic glucagon secretion, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (43) A method for promoting urine formation, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (44) A method for preventing or treating obesity, hyperlipemia, type II diabetes mellitus, hypoglycemia, hypertension, diabetic neuropathy, diabetic nephropathy, diabetic retinopathy, edema, urinary disturbances, insulin resistance, unstable diabetes, fatty atrophy, insulin allergy, insulinoma, arteriosclerosis, thrombotic disorders or lipotoxicity, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof. (45) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture a pancreatic glucagon secretagogue agent. (46) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for promoting urine formation. (47) Use of the metastin derivative (II) according to (1) or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating obesity, hyperlipemia, type II diabetes mellitus, hypoglycemia, hypertension, diabetic neuropathy, diabetic nephropathy, diabetic retinopathy, edema, urinary disturbances, insulin resistance, unstable diabetes, fatty atrophy, insulin allergy, insulinoma, arteriosclerosis, thrombotic disorders or lipotoxicity. (48) An agent for suppressing gonadotropic hormone secretion or an agent for suppressing sex hormone secretion comprising the metastin derivative (III) represented by formula:

[wherein: V′ represents a group represented by formula:

a group represented by formula:

or a group represented by formula:

n represents 0 or 1;

W¹ represents N, CH or O (provided that W¹ is N or CH, n represents 1, and when W¹ is O, n represents 0);

W² represents N or CH;

Z¹, Z³, Z⁵ and Z⁷ each represents hydrogen atom or a C₁₋₃ alkyl group;

Z², Z⁴, Z⁶ and Z⁸ each represents hydrogen atom, O or S;

R¹ represents (1) hydrogen atom, (2) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group, (3) a cyclic or linear C₁₋₁₀ alkyl group or (4) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (5) an optionally substituted aromatic cyclic group;

R¹ represents (1) hydrogen atom or (2) a cyclic or linear C₁₋₁₀ alkyl group, (3) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (4) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group;

R³ represents (1) a C₁₋₈ alkyl group having an optionally substituted basic group and optionally having an additional substituent, (2) an aralkyl group having an optionally substituted basic group and optionally having an additional substituent, (3) a C₁₋₄ alkyl group having a non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent, or (4) a C₁₋₄ alkyl group having a non-aromatic heterocyclic group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent;

R⁴ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7;

Q¹ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7;

Q² represents (1) CH₂, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, (2) NH, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, or (3) O; Y represents a group represented by formula: —CONH—, —CSNH—, —CH₂NH—, —NHCO—, —CH₂O—, —CH₂S—, —COO—, —CSO—, —CH₂CH₂—, or —CH═CH—, which may optionally be substituted with a C₁₋₆ alkyl group; and,

Z⁹ represents hydrogen atom, O or S; and,

P and P′, which may be the same or different, each may form a ring by combining P and P′ or P and Q¹ together and represents:

(1) hydrogen atom;

(2) an optional amino acid residue continuously or discontinuously bound from the C terminus of the 1-48 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1;

(3) a group represented by formula:

J¹-J²-C(J³)(Q³)Y¹C(J⁴)(Q⁴)Y²C(J⁵)(Q⁵)Y³C(J⁶)(Q⁶)C(=Z¹¹)-

(wherein:

-   -   J¹ represents (a) hydrogen atom or (b) (i) a C₁₋₁₅ acyl         group, (ii) a C₁₋₁₅ alkyl group, (iii) a C₆₋₁₄ aryl group, (iv)         carbamoyl group, (v) carboxyl group, (vi) sulfino group, (vii)         amidino group, (viii) glyoxyloyl group or (ix) amino group,         which groups may optionally be substituted with a substituent         containing an optionally substituted cyclic group;     -   J² represents (1) NH optionally substituted with a C₁₋₆ alkyl         group, (2) CH₂ optionally substituted with a C₁₋₆ alkyl         group, (3) O or (4) S;     -   J³ through J⁶ each represents hydrogen atom or a C₁₋₃ alkyl         group;     -   Q³ through Q⁶ each represents a C₁₋₄ alkyl group, which may         optionally have a substituent selected from the group consisting         of:     -   (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group,     -   (2) an optionally substituted 5- to 14-membered aromatic         heterocyclic group consisting of 1 to 7 carbon atoms and hetero         atoms selected from the group consisting of nitrogen, oxygen and         sulfur atoms,     -   (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group,     -   (4) an optionally substituted 5- to 14-membered aromatic fused         heterocyclic group consisting of 3 to 11 carbon atoms and hetero         atoms selected from the group consisting of nitrogen, oxygen and         sulfur atoms,     -   (5) an optionally substituted non-aromatic cyclic hydrocarbon         group having carbon atoms not greater than 7,     -   (6) an optionally substituted non-aromatic heterocyclic group         having carbon atoms not greater than 7,     -   (7) an optionally substituted amino group,     -   (8) an optionally substituted guanidino group,     -   (9) an optionally substituted hydroxyl group,     -   (10) an optionally substituted carboxyl group,     -   (11) an optionally substituted carbamoyl group, and     -   (12) an optionally substituted sulfhydryl group, or hydrogen         atom;     -   J³ and Q³, J⁴ and Q⁴, J⁵ and Q⁵ or J⁶ and Q⁶ may be combined         together, or, Z¹ and R¹, J² and Q³, Y¹ and Q⁴, Y² and Q⁵, or Y³         and Q⁶ may be combined together, to form a ring;     -   Y¹ through Y³ each represents a group represented by formula:     -   —CON(J¹³)-, —CSN(J¹³)-, —C(J¹⁴)N(J¹³)- or —N(J¹³)CO— (wherein         J¹³ and J¹⁴ each represents hydrogen atom or a C₁₋₃ alkyl         group); and,     -   Z¹⁰ represents hydrogen atom, O or S);

(4) a group represented by formula:

J¹-J²-C(J⁷)(Q⁷)Y²C(J⁸)(Q⁸)Y³C(J⁹)(Q⁹)C(=Z¹⁰)-

(wherein:

J¹ and J², each has the same significance as described above;

J⁷ through J⁹ have the same significance as for J³;

Q⁷ through Q⁹ have the same significance as for Q³;

Y² and Y³ each has the same significance as described above;

Z¹⁰ has the same significance as described above;

J⁷ and Q⁷, J⁸ and Q⁸ or J⁹ and Q⁹ may be combined together, or, J² and Q⁷, Y² and Q⁸ or Y³ and Q⁹ may be combined together, to form a ring);

(5) a group represented by formula:

J¹-J²-C(J¹⁰)(Q¹⁰)Y³C(J¹¹)(Q¹¹)C(=Z¹⁰)-

(wherein:

J¹ and J² have the same significance as described above represents;

J¹⁰ and J¹¹ have the same significance as for J³;

Q¹⁰ and Q¹¹ have the same significance as for Q³;

Y³ has the same significance as described above;

Z¹⁰ has the same significance as described above; and,

J¹⁰ and Q¹⁰ or J¹¹ and Q¹¹ may be combined together, or J² and Q¹⁰ or Y³ and Q¹¹ may be combined together, to form a ring);

(6) a group represented by formula:

J¹-J²-C(J¹²)²)(Q¹²)C(=Z¹⁰)-

(wherein;

J¹ and J² have the same significance as described above;

J¹² has the same significance as for J³;

Q¹² has the same significance as for Q³;

Z¹⁰ has the same significance as described above; and

J¹² and Q¹² may be combined together, or J² and Q¹² may be combined together, to form a ring); or,

(7) a group represented by formula:

J¹- (wherein J¹ has the same significance as described above)] or a salt thereof, or a prodrug thereof. (49) The agent according to (48), wherein the metastin derivative (III) is the metastin derivative (II) according to (1). (50) The agent according to (48), wherein V′ is a group represented by formula:

(wherein each symbol has the same significance as described in (48)). (51) The agent according to (48), wherein V′ is a group represented by formula:

(wherein each symbol has the same significance as described in (48)). (52) The agent according to (48), wherein V′ is a group represented by formula:

(wherein each symbol has the same significance as described in claim 48). (53) The agent according to (48), wherein the metastin derivative (III) is:

(1) D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 141), (2) D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 174), (3) 3-(3-Indolyl)propionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 260), (4) 3-Phenylpropionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 269), (5) 2-(indol-3-yl)ethylcarbamoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 279), (6) D-Tyr-Asn-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 286), (7) D-Tyr-Asn-Trp-Asn-Ser-PheΨ(CSNH)Gly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 296), (8)TyrΨ(CH₂NH)Asn-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 300), (9) D-Tyr-D-Asn-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 303), (10) D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 305), (11) D-Tyr-Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ (Compound No. 318), (12) D-Tyr-Asn-Trp-Asn-Ser-PheΨ(NHCO)Gly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 319), (13) 3-(3-Pyridyl)propionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 322), (14) 4-Imidazoleacetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 323), (15) GuAmb-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 332), (16) GuAmb-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 333), (17) GuAmb-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 334), (18) 3-(3-Indolyl)propionyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 339), (19) Benzoyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 341), (20) Indole-3-acetyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 345), (21) Ac-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 346), (22) Benzoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 353), (23) 3-(3-Indolyl)propionyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 354), (24) Ac-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 358), (25) 2-(Indol-3-yl)ethylcarbamoyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 364), (26) 2-(Indol-3-yl)ethylcarbamoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 369), (27) (2S)-2-acethoxy-3-phenylpropionyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 373), (28) (2S)-2-(3-Indolylprpionyloxy)-3-phenylpropionyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 379), (29) (2S)-2-Benzoyloxy-3-phenylpropionyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 380), (30) D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 385), (31) 3-(3-Pyridyl)propionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 386), (32) Dibenzylcarbamoyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 393), (33) Benzylphenethylcarbamoyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 417), (34) Benzoyl-PheΨ(NHCO)Gly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 423), (35) Benzoyl-AzaPhe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 431), (36) 3-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 432), (37) 2-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 435), (38) 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 436), (39) Propionyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 437), (40) Isobutyryl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 438), (41) Cyclohexanecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 439), (42) Phenylacetyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 440), (43) Benzoyl-Pya(2)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 441), (44) 6-Methylnicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 445), (45) Pyrazinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 446), (46) Cyclopropanecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 447), (47) Trifluoroacetyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 448), (48) Benzoyl-Cha-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 449), (49) Cyclopropanecarbonyl-Cha-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 451), (50) (R)-3-hydroxy-2-methylpropionyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 452), (51) 2-Hydroxyisobutyryl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 453), (52) 3-Furancarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 454), (53) Pyrrole-2-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 455), (54) 4-Imidazolecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 459), (55) 6-Hydroxynicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 462), (56) 6-Chloronicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 463), (57) 6-(Trifluoromethyl)nicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 464), (58) Dimethylcarbamoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 467), (59) 1-Azetidinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 468), (60) 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 471), (61) 4-Aminobenzoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 472), (62) 4-Aminomethylbenzoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 473), (63) Pyrrole-3-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 474), (64) Pyrimidine-4-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 475), (65) Pyrimidine-2-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 479), (66) Pyridazine-4-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 480), (67) D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har-Trp-NH₂ (Compound No. 481), (68) D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Lys-Phe-NH₂ (Compound No. 487), (69) D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har-Phe-NH₂ (Compound No. 488), (70) D-Tyr-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 490), (71) D-Tyr-D-Pya(4)-Asn-Trp-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 491), (72) D-Tyr-D-Pya(4)-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 492), (73) D-Tyr-D-Pya(4)-Thr-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 493), (74) D-Tyr-D-Pya(4)-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 496), (75) D-Tyr-D-Pya(4)-Asn-Ser-Cha-Ala-Leu-Arg(Me)-Trp-NH₂ (Compound No. 497), (76) D-Tyr-D-Pya(4)-Asn-Ile-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 498), (77) 3-Phenylpropionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 499), (78) 3-Phenylpropionyl-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 500), (79) D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 501), (80) D-Tyr-Pya(4)-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 502), (81) D-Tyr-D-Trp-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 503), (82)6-Aminocaproyl-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 504), (83) 3-Phenylpropionyl-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 505), (84) 3-Phenylpropionyl-Asn-Ile-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 506), (85) 3-Phenylpropionyl-Asn-Ser-Trp-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 507), (86) 3-Phenylpropionyl-Asn-Ser-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 508), (87) Benzoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 509), (88)Ac-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 510), (89) D-Tyr-D-Trp-Ala-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 511), (90) D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 512), (91) D-Tyr-D-Trp-Abu-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 513), (92) D-Tyr-D-Phe-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 514), (93) D-Tyr-D-Pya(4)-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 515), (94) des(1)-Ac-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 (Compound No. 516), (95) des(1-3)-3-Phenylpropionyl-[Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 517), (96)des(1-3)-3-Phenylpropionyl-[Cha6,Arg(Me)9,Trp10]MS10 (Compound No. 518), (97) des(1-3)-Phenylacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 519), (98) des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7]MS10 (Compound No. 521), (99) des(1-3)-Benzoyl-[Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 522), (100) des(1-3)-Benzoyl-[Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 523), (101) des(1-3)-3-Phenylpropionyl-[Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 524), (102) des(1)-[D-Tyr2,D-Pya(4)3,Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 527), (103) des(1)-[D-Tyr2,D-Pya(4)3,Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 528), (104) des(1)-[D-Tyr2,D-Pya(4)3,Tle5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 529), (105) des(1)-[D-Tyr2,D-Pya(4)3,Phg5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 530), (106) des(1-3)-3-Phenylpropionyl-[Pic(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 531), (107) des(1-3)-3-Phenylpropionyl-[Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 532), (108) des(1-3)-3-Phenylpropionyl-[D-Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 533), (109) des(1-3)-Cyclopropanecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 534), (110) des(1-3)-2-Naphthoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 535), (111) [Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 536), (112) Arg-[Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 537), (113) Arg-[Acp1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 538), (114) des(1)-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 539), (115) des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 540), (116) D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 541), (117) D-Arg-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 542), (118) des(1-3)-Benzoyl-[Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 545), (119) des(1-3)-3-Phenylpropionyl-[Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 546), (120) des(1)-[D-Tyr2,D-Pya(4)3,Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 547), (121) des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,10Ψ,CSNH]MS10 (Compound No. 548), (122) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 550), (123) Ac-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 551), (124) D-Dap-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 552), (125) D-Nle-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 553), (126) D-Arg-[β-Ala1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 554), (127) D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 555), (128) D-Arg-D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 556), (129) D-Arg-D-Arg-D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 557), (130) des(1)-Ac-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 558), (131) des(1-2)-3-(4-Hydroxyphenyl)propionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 559), (132) D-Arg-[Acp1,D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 561), (133) des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 562), (134) des(1)-Ac-[D-Tyr2,D-Trp3,Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 563), (135) des(1)-Ac-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 564), (136) des(1)-Benzoyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 565), (137) des(1)-Cyclopropanecarbonyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 566), (138) des(1)-Butyryl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 567), (139) Ac-[D-Arg1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 568), (140) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,6Ψ7,CH2NH,Arg(Me)9,Trp10]MS10 (Compound No. 569), (141) des(1)-Me-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 570), (142) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9]MS10 (Compound No. 571), (143) des(1)-[D-Trp2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 572), (144) des(1)-Ac-[D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 573), (145) des(1)-Ac-[D-Tyr2,D-Trp3,Gln4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 576), (146) des(1)-Ac-[D-Tyr2,D-Trp3,Ser4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 577), (147) des(1)-Ac-[D-Tyr2,D-Trp3,Thr4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 578), (148) des(1)-Ac-[D-Tyr2,D-Trp3,Alb4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 579), (149) des(1)-Ac-[D-Tyr2,D-Trp3,Ser(Me)5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 580), (150) des(1)-Ac-[D-Tyr2,D-Trp3,Dap(Ac)4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 584), (151) des(1)-Ac-[D-Tyr2,D-Trp3,Dap(For)4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 585), (152) des(1)-Ac-[D-Tyr2,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 586), (153) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Nal(2)10]MS10 (Compound No. 589), (154) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Thi10]MS10 (Compound No. 590), (155) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Tyr10]MS10 (Compound No. 591), (156) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 (Compound No. 592), (157) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Hph10]MS10 (Compound No. 594), (158) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Cha10]MS10 (Compound No. 595), (159) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Leu10]MS10 (Compound No. 596), (160) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 597), (161) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Arg(Me)9,Trp10]MS10 (Compound No. 598), (162) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Orn9,Trp10]MS10 (Compound No. 599), (163) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Trp10]MS10 (Compound No. 600), (164) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,Arg(Me)9,Trp10]MS10 (Compound No. 601), (165) des(1)-Ac-[D-NMeTyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Compound No. 602), (166) des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 603), (167) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Tos)9,Trp10]MS10 (Compound No. 604), (168) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(NO2)9,Trp10]MS10 (Compound No. 605), (169) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)asym9,Trp10]MS10 (Compound No. 607), (170) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)sym9,Trp10]MS10 (Compound No. 608), (171) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Et)9,Trp10]MS10 (Compound No. 609), (172) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys(Me2)9,Trp10]MS10 (Compound No. 610), (173) des(1)-Ac-[Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 611), (174) des(1)-For-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 612), (175) des(1)-Propionyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 613), (176) des(1)-Amidino-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 614), (177) des(1)-Ac-[Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 615), (178) des(1)-Ac-[D-Ala2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 616), (179) des(1)-Ac-[D-Leu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 617), (180) des(1)-Ac-[D-Phe2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 618), (181) des(1)-Ac-[D-Nal(1)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 619), (182) des(1)-Ac-[D-Nal(2)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 620), (183) des(1)-Ac-[D-Lys2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 621) (184) des(1)-Ac-[D-Glu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 622), (185) des(1)-Ac-[D-Tyr2,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 623), (186) des(1)-Ac-[D-Tyr2,Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 624), (187) des(1)-Ac-[D-Tyr2,D-Ala3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 625), (188) des(1)-Ac-[D-Tyr2,D-Leu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 626), (189) des(1)-Ac-[D-Tyr2,D-Phe3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 627), (190) des(1)-Ac-[D-Tyr2,D-Thr3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 628), (191) des(1)-Ac-[D-Tyr2,D-Lys3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 629), (192) des(1)-Ac-[D-Tyr2,D-Glu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 630), (193) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Ala6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 631), (194) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Leu6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 632), (195) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Lys6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 633), (196) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Glu6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 634), (197) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Pya(4)6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 635), (198) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,NMePhe6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 636), (199) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 637), (200) des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 638), (201) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys9,Trp10]MS10 (Compound No. 639), (202) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ala8,Arg(Me)9,Trp10]MS10 (Compound No. 641), (203) des(1)-Ac[D-Tyr2,D-Trp3,Thr5,AzaGly7,Val8,Arg(Me)9,Trp10]MS10 (Compound No. 642), (204) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Phe8,Arg(Me)9,Trp10]MS10 (Compound No. 643), (205) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ser8,Arg(Me)9,Trp10]MS10 (Compound No. 644), (206) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har9,Trp10]MS10 (Compound No. 645), (207) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har(Me)9,Trp10]MS10 (Compound No. 646), (208) des(1)-Ac-[D-Tyr2,D-Trp3,Asp4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 647), (209) [Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 648), (210) Ac-[Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 649), (211) [D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 650), (212) Ac-[D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 651), (213) pGlu-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 652), (214) des(1)-Ac-[D-Tyr2,D-Trp3,D-Asn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 653), (215) des(1)-Ac-[D-Tyr2,D-Trp3,D-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 654), (216) des(1)-Ac-[D-Tyr2,D-Trp3,NMeAsn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 655), (217) des(1)-Ac-[D-Tyr2,D-Trp3,NMeSer5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 656), (218) des(1)-Ac-[D-Tyr2,Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 657), (219) des(1)-Ac-[D-Tyr2,D-Pya(2)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 658), (220) des(1)-Ac-[D-Tyr2,D-Trp3,allo-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 659), (221) des(1)-Ac-[D-Tyr2,D-Pya(3)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 660), (222) des(1)-Ac-[D-Tyr2,D-Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 661), (223) des(1)-Ac-[D-Tyr2,Tic3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 662), (224) des(1)-Ac-[D-Trp2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 663), (225) des(1)-Ac-[Tyr2,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 664), (226) des(1-2)-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 665), (227) des(1-2)-Ac-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 666), (228) des(1-2)-Hexanoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 667), (229) des(1-2)-Cyclohexanecarbonyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 668), (230) des(1-2)-Benzoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 669), (231) des(1-2)-3-Pyridinepropionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 670), (232) des(1-2)-Adipoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 671), (233) des(1)-Ac-[D-Tyr2,NMeTrp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 672), (234) des(1-2)-6-Aminocaproyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 674), (235) [D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 675) (236) Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 676) (237) Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Nva8,Arg(Me)9,Trp10]MS10 (Compound No. 677) (238) Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ile8,Arg(Me)9,Trp10]MS10 (Compound No. 678) (239) des(1-2)-Amidino-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 679) (240) des(1-2)-Glycoloyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 680) (241) des(1)-Glycoloyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 681) (242) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Gln8,Arg(Me)9,Trp10]MS10 (Compound No. 682) (243) des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9]MS10 (Compound No. 685) (244) des(1)-Ac-[D-Tyr2,D-Trp3,Gly4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 686) (245) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Pya(4)9,Trp10]MS10 (Compound No. 688) (246) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,D-Trp10]MS10 (Compound No. 689) (247) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 691) (248) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Trp6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 692) (249) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr(Me)6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 693) (250) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Nal(2)6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 694) (251) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Thi6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 695) (252) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 696) (253) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Abu8,Arg(Me)9,Trp10]MS10 (Compound No. 698) (254) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,γMeLeu8,Arg(Me)9,Trp10]MS10 (Compound No. 699) (255) des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Aib8,,Arg(Me)9,Trp10]MS10 (Compound No. 700) (256) des(1)-Ac-[D-Tyr2,D-Trp3,Dap4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 701) (257) des(1)-Ac-[D-Tyr2,D-Trp3,Asp(NHMe)4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 702) (258) des(1)-Ac-[D-Tyr2,D-Trp3,Asp(NMe2)4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 703). (54) The agent according to (48) to (53), which is a down-regulating agent for gonadotropic hormone or sex hormone. (55) The agent according to (48) to (53), which is a down-regulating agent for human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO: 9. (56) The agent according to (48) to (55), which is an agent for preventing or treating hormone-dependent cancer. (57) A method for suppressing gonadotropic hormone secretion or suppressing sex hormone secretion, which comprises administering to a mammal an effective dose of the metastin derivative (III) according to (48) or a salt thereof, or a prodrug thereof. (58) A method for down regulating gonadotropic hormone or sex hormone, which comprises administering to a mammal an effective dose of the metastin derivative according to (48) or a salt thereof, or a prodrug thereof. (59) A method for down regulating human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO: 9, which comprises administering to a mammal an effective dose of the metastin derivative according to (48) or a salt thereof, or a prodrug thereof. (60) A method for preventing or treating hormone-dependent cancer, which comprises administering to a mammal an effective dose of the metastin derivative according to (48) or a salt thereof, or a prodrug thereof. (61) Use of the metastin derivative according to (48) or a salt thereof, or a prodrug thereof to manufacture an agent for suppressing gonadotropic hormone secretion or an agent for suppressing sex hormone secretion. (62) Use of the metastin derivative according to (48) or a salt thereof, or a prodrug thereof to manufacture a down-regulating agent for gonadotropic hormone or sex hormone. (63) Use of the metastin derivative according to (48) or a salt thereof, or a prodrug thereof to manufacture a down-regulating agent for human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO: 9. (64) Use of the metastin derivative according to (48) or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating hormone-dependent cancer. (65) A metastin derivative represented by formula:

XX0-XX2-XX3-XX4-XX5-XX6-AzaGly-XX8-XX9-XX10-NH₂

(wherein:

XX0 represents formyl, C₁₋₆ alkanoyl, cyclopropanecarbonyl, 6-(acetyl-D-arginylamino)caproyl, 6-((R)-2,3-diaminopropionylamino)caproyl, 6-(D-norleucylamino)caproyl, 4-(D-arginylamino)butyryl, 3-(4-Hydroxyphenyl)propionyl, glycyl, tyrosyl, acetylglycyl, acetyltyrosyl, D-tyrosyl, acetyl-D-tyrosyl, pyroglutamyl, 3-(pyridine-3-yl)propionyl, adipoyl or 6-aminocaproyl;

XX2 represents Tyr, D-Tyr, D-Ala, D-Leu, D-Phe, D-Lys, D-Trp or bond arm;

XX3 represents Trp, Pro, 4-pyridylalanine, Tic, D-Trp, D-Ala, D-Leu, D-Phe, D-Lys, D-Glu, D-2-pyridylalanine, D-3-pyridylalanine or D-4-pyridylalanine;

XX4 represents Asn, 2-amino-3-ureidopropion acid, N⁶²-formyldiaminopropionic acid or N-acetyldiaminopropionic acid;

XX5 represents Ser, Thr or Val;

XX6 represents Phe, Tyr, Trp, Tyr(Me), Thi, Nal(2), Cha, 4-pyridylalanine or 4-fluorophenylalanine;

AzaGly represents azaglycine;

XX8 represents Leu, Nva or Val;

XX9 represents Arg, Orn, Arg(Me) or Arg(symMe2);

XX10 represents Phe, Trp, 2-naphthylalanine, 2-thienylalanine, tyrosine or 4-fluorophenylalanine), or a salt thereof.

(66) D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 305), D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 385), D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 501), Benzoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 509), D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 512), Ac-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 516), D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 540), D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 541), Benzoyl-Asn-Ser-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 545), D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-PheΨ(CSNH)NH₂ (Compound No. 548), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 550), Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 551), D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 552), D-Nle-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 553), D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 555), Ac-D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 558), 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 559), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 562), Ac-D-Tyr-D-Trp-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 564), Cyclopropanecarbonyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 566), Butyryl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 567), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 571), Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 579), Ac-D-Tyr-D-Trp-Asn-Ser(Me)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 580), Ac-D-Tyr-D-Trp-Dap(Ac)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 584), Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 585), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)-NH₂ (Compound No. 589), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Thi-NH₂ (Compound No. 590), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Tyr-NH₂ (Compound No. 591), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ (Compound No. 592), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Orn-Trp-NH₂ (Compound No. 599), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg-Trp-NH₂ (Compound No. 600), Ac-D-NMeTyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 602), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(symMe2)-Trp-NH₂ (Compound No. 608), For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 612), Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 613), Ac-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 615), Ac-D-Ala-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 616), Ac-D-Leu-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 617), Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 618), Ac-D-Lys-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 621), Ac-D-Tyr-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 623), Ac-D-Tyr-D-Ala-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 625), Ac-D-Tyr-D-Leu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 626), Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 627), Ac-D-Tyr-D-Lys-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 629), Ac-D-Tyr-D-Glu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 630), Ac-D-Tyr-D-Trp-Asn-Thr-Pya(4)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 635), Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 637), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 638), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Val-Arg(Me)-Trp-NH₂ (Compound No. 642), Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 648), Ac-Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 649), D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 650), Ac-D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 651), pGlu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 652), Ac-D-Tyr-Pro-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 657), Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 658), Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 660), Ac-D-Tyr-Tic-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 662), Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 663), Ac-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 666), Hexanoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 667), 3-Pyridinepropionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 670), Adipoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 671), Ac-D-Tyr-NMeTrp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 672), 6-Aminocaproyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 674), or salts thereof. (67) Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 550), Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 551), D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 552), Ac-D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 558), 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 559), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 562), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 571), Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 579), Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 585), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)-NH₂ (Compound No. 589), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ (Compound No. 592), For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 612), Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 613), Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 618), Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 627), Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 637), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 638), Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 658), Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 660), Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 663), or salts thereof. (68) The agent according to (48) above, which is an agent for potentiating immunity (prophylactic agent for infection after bone-marrow transplant, an agent for potentiating immunity intended for cancer). (69) The agent according to (48) above, which is a prophylactic/therapeutic agent for bulbospinal muscular atrophy. (70) The agent according to (48) above, which is a prophylactic/therapeutic agent for protecting ovary. (71) The agent according to (48) above, which is a prophylactic/therapeutic agent for benign prostate hypertrophy (BPH). (72) The agent according to (48) above, which is a prophylactic/therapeutic agent for gender identity disorder. (73) The agent according to (48) above, which is a prophylactic/therapeutic agent for in vitro fertilization (IVF).

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows evaluation of the chemotaxis inhibition activity of Compound Nos. 322, 305, 303, 286, 232 and 141 using hOT7T175-expressed CHO cells. On the abscissa, FBS− designates the absence of FBS, FBS+ designates the presence of FBS, 322 designates the addition of Compound No. 322, 305 designates the addition of Compound No. 305, 303 designates the addition of Compound No. 303, 286 designates the addition of Compound No. 286, 232 designates the addition of Compound No. 232, 141 designates the addition of Compound No. 141, (1-54) designates the addition of metastin (1-54), and (45-54) designates the addition of metastin 45-54. The ordinate denotes a relative activity when the chemotactic activity in the presence of FBS is made 100%.

FIG. 2 shows evaluation of the tumor growth inhibition activity of Compound No. 322 and Metastin (1-54) using tumor-bearing mice with human colonic carcinoma-derived cell line SW620, wherein the value indicates (mean value)± (standard error). Symbols open diamond, open circle, closed circle and closed square designate the results obtained when Vehicle (distilled water), Compound No. 322 (0.1 mM), Compound No. 322 (1 mM), and Metastin (Metastin 1-54) were added, respectively. The abscissa denotes the number of days after injection. The bar on the abscissa designates a dosing period. The ordinate denotes a tumor size (mm³).

FIG. 3 shows evaluation of the tumor growth inhibition activity of Compound No. 305 and Metastin (1-54) using tumor-bearing mice with human colonic carcinoma-derived cell line SW620, wherein the value indicates (mean value)±(standard error). Symbols open diamond, open circle, closed circle and closed square designate the results obtained when Vehicle (distilled water), Compound No. 305 (0.1 mM), Compound No. 305 (1 mM), and Metastin (Metastin 1-54) were added, respectively. The abscissa denotes the number of days after injection. The bar on the abscissa designates a dosing period. The ordinate denotes a tumor size (mm³).

FIG. 4 shows the results obtained by monitoring changes in blood glucose level when metastin was intravenously injected into rats under no anesthesia. In the figure, symbols open circle, closed triangle, closed circle and closed diamond designate blood glucose level in the saline group, the 17 nmol/kg metastin group, the 80 nmol/kg metastin group and the 170 nmol/kg metastin group, respectively. The value indicates (mean±SE) (n=5). Symbol * designates that the P-value is 0.05 or less, when compared to the saline group and symbol ** designates that the P-value is 0.01 or less, when compared to the saline group.

FIG. 5 shows the results obtained by monitoring changes in blood glucagon level when metastin was intravenously injected into rats under no anesthesia. In the figure, symbols open circle and closed circle designate blood glucagon level in the saline group and the 80 nmol/kg metastin group, respectively. The value indicates (mean±SE) (n=6-9). Symbol * designates that the P-value is 0.05 or less, when compared to the saline group and symbol ** designates that the P-value is 0.01 or less, when compared to the saline group.

FIG. 6 shows the results obtained by monitoring changes in blood insulin level when metastin was intravenously injected into rats under no anesthesia. In the figure, symbols open circle and closed circle designate blood insulin level in the saline group and the 80 nmol/kg metastin group, respectively. The value indicates (mean±SE) (n=6-9).

FIG. 7 shows the results obtained by monitoring changes in blood corticosterone level when metastin was intravenously injected into rats under no anesthesia. In the figure, symbols open circle and closed circle designate blood corticosterone level in the saline group and the 80 nmol/kg metastin group, respectively. The value indicates (mean±SE) (n=4-5).

FIG. 8 shows the results obtained by monitoring changes in thyroid hormone (T3) level in blood when metastin was intravenously injected into rats under no anesthesia. In the figure, symbols open circle and closed circle designate thyroid hormone (T3) level in blood in the saline group and the 80 nmol/kg metastin group, respectively. The value indicates (mean±SE) (n=4-5).

FIG. 9 shows the results obtained by monitoring changes in blood glucose level when metastin was intravenously injected into rats under no anesthesia. In the figure, symbols open circle and closed circle designate blood glucose level in the saline group and the 80 nmol/kg metastin group, respectively. The value indicates (mean±SE) (n 6-9). Symbol * designates that the P-value is 0.05 or less, when compared to the saline group

FIG. 10 shows the results obtained by monitoring changes in blood glucose level when a metastin derivative was intravenously injected into rats under no anesthesia. In the figure, symbols open circle, closed circle and closed triangle designate blood glucose level in the saline group, the 80 nmol/kg KiSS1-305 group and the 80 mmol/kg metastin group, respectively. The value indicates (mean±SE) (n=5). Symbol * designates that the P-value is 0.05 or less, when compared to the saline group and symbol ** designates that the P-value is 0.01 or less, when compared to the saline group.

FIG. 11 shows the results obtained by monitoring changes in blood glucagon level when metastin was intravenously injected into rats under no anesthesia. In the figure, symbols open circle, closed circle and closed triangle designate blood glucagon level in the saline group and the 80 nmol/kg KiSS1-305 (Compound No. 305) group, the 80 nmol/kg KiSS1-322 (Compound No. 322) group, respectively. The value indicates (mean±SE) (n=5). Symbol * designates that the P-value is 0.05 or less, when compared to the saline group.

FIG. 12 shows the level of estradiol contained in the rat plasma. In the figure, the ordinate and the abscissa denote the estradiol level and the drug receiving groups, respectively.

FIG. 13 shows the level of progesterone contained in the rat plasma. In the figure, the ordinate and the abscissa denote the estradiol level and the drug receiving groups, respectively.

FIG. 14 shows changes in the blood FSH level in immature rat by metastin injection.

FIG. 15 shows changes in the blood LH level in immature rat by metastin injection.

FIG. 16 shows changes in the blood progesterone level in immature rat by metastin injection.

FIG. 17 shows changes in the blood FSH level in rat by metastin injection.

FIG. 18 shows changes in the blood LH level in rat by metastin injection.

FIG. 19 shows changes in the blood testosterone level in rat by metastin injection.

FIG. 20 shows the number of oocytes per individual rat in each group measured in TEST EXAMPLE 13. In the figure, symbol closed diamond designates data for per individual rat and symbol closed square designates a mean value in each group.

FIG. 21 shows the blood estradiol level in each dosing group measured in TEST EXAMPLE 13. In the figure, symbol closed triangle designates data for per individual rat and symbol closed square designates a mean value in each group.

FIG. 22 shows the blood progesterone level in each group measured in TEST EXAMPLE 13. In the figure, symbol closed triangle designates data for per individual rat and symbol closed square designates a mean value in each group.

BEST MODE OF EMBODIMENTS OF THE INVENTION

In the formulae described above, n represents 0 or 1; W¹ represents N, CH or O (provided that W¹ is N or CH, n represents 1, and when W¹ is O, n represents 0); W² represents N or CH; Z¹, Z³, Z⁵ and Z⁷ each represents hydrogen atom or a C₁₋₃ alkyl group; and Z², Z⁴, Z⁶ and Z⁸ each represents hydrogen atom, O or S;

wherein, when Z², Z⁴, Z⁶ or Z⁸ represents hydrogen atom, a structure of the moiety represented by >C=Z², >C=Z⁴, >C=Z⁶ or >C=Z⁸ each indicates a structure of >CH₂.

The C₁₋₃ alkyl group used includes methyl group, ethyl group, propyl group and isopropyl group.

W¹ is preferably N and W² is preferably CH.

Preferred combinations of Z¹ through Z⁸ further include the cases that Z¹ and

Z³ represent hydrogen atom, each of Z⁵ and Z⁷ represents hydrogen atom or a C₁₋₃ alkyl group and each of Z², Z⁴, Z⁶ and Z⁸ represents O or S.

More preferably, the combinations of Z¹ through Z⁸ include:

(a) the case where Z¹ is hydrogen atom, Z³ is hydrogen atom, Z⁵ is hydrogen atom and Z⁷ is hydrogen atom, and Z² is O, Z⁴ is O, Z⁶ is O and Z⁸ is O;

(b) the case where Z¹ is hydrogen atom, Z³ is hydrogen atom, Z⁵ is hydrogen atom and Z⁷ is hydrogen atom, and Z² is O, Z⁴ is O, Z⁶ is O and Z⁸ is S;

(c) the case where Z¹ and Z³ are hydrogen atom and Z⁵ is hydrogen atom, Z⁷ is methyl group and Z² is O, and Z⁴ is O, Z⁶ is O and Z⁸ is O; etc. Among these cases, (a) and (b) are preferred.

R¹ represents (1) hydrogen atom, (2) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group, (3) a cyclic or linear C₁₋₁₀ alkyl group or (4) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (5) an optionally substituted aromatic cyclic group. Inter alia, preferred R¹ includes (1) hydrogen atom or (2) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group, more preferably includes (1) hydrogen atom or (2) a C₁₋₈ alkyl group substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group.

The “C₁₋₈ alkyl group” used includes, for example, a linear C₁₋₈ alkyl group such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, etc., and a cyclic C₃₋₈ alkyl group such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc. C₁₋₃ alkyl groups such as methyl, ethyl, etc. are particularly preferred.

The “optionally substituted carbamoyl group” used includes, for example, carbamoyl, a mono-C₁₋₆ alkylcarbamoyl group (e.g., methylcarbamoyl, ethylcarbamoyl, etc.), a di-C₁₋₆ alkylcarbamoyl group (e.g., dimethylcarbamoyl, diethylcarbamoyl, ethylmethylcarbamoyl, etc.), a mono- or di-C₆₋₁₄ arylcarbamoyl group (e.g., phenylcarbamoyl, 1-naphthylcarbamoyl, 2-naphthylcarbamoyl, etc.), a mono- or di-5- or 7-membered heterocyclic carbamoyl group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 2-pyridylcarbamoyl, 3-pyridylcarbamoyl, 4-pyridylcarbamoyl, 2-thienylcarbamoyl, 3-thienylcarbamoyl, etc.) and the like.

The “optionally substituted hydroxyl group” used includes, for example, hydroxy group, an optionally substituted C₁₋₆ alkoxy group, an optionally substituted C₆₋₁₄ aryloxy group, an optionally substituted C₇₋₁₆ aralkyloxy group, etc. The “optionally substituted C₁₋₆ alkoxy group,” “optionally substituted C₆₋₁₄ aryloxy group” and “optionally substituted C₇₋₁₆ aralkyloxy group” used are those of the “optionally substituted C₁₋₆ alkoxy group,” “optionally substituted C₆₋₁₄ aryloxy group” and “optionally substituted C₇₋₁₆ aralkyloxy group” in Substituent group A, which will be later described.

The “aromatic cyclic group” in “optionally substituted aromatic cyclic group” includes, for example, an aromatic hydrocarbon group, aromatic heterocyclic group, an aromatic fused cyclic group, an aromatic fused heterocyclic group, etc.

The “aromatic hydrocarbon group” used includes, for example, a C₆₋₁₄ aryl group such as phenyl, 2-biphenylyl, 3-biphenylyl, 4-biphenylyl, cyclooctatetraenyl, etc.

The “aromatic heterocyclic group” used includes, for example, a 5- to 14-membered, preferably 5- to 10-membered, more preferably 5- or 6-membered aromatic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms. Specific examples are thienyl (e.g., 2-thienyl, 3-thienyl), furyl (e.g., 2-furyl, 3-furyl), pyridyl (e.g., 2-pyridyl, 3-pyridyl, 4-pyridyl), thiazolyl (e.g., 2-thiazolyl, 4-thiazolyl, 5-thiazolyl), oxazolyl (e.g., 2-oxazolyl, 4-oxazolyl), pyrazinyl, pyrimidinyl (e.g., 2-pyrimidinyl, 4-pyrimidinyl), pyrrolyl (e.g., 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl), imidazolyl (e.g., 1-imidazolyl, 2-imidazolyl, 4-imidazolyl), pyrazolyl (e.g., 1-pyrazolyl, 3-pyrazolyl, 4-pyrazolyl), pyridazinyl (e.g., 3-pyridazinyl, 4-pyridazinyl), isothiazolyl (e.g., 3-isothiazolyl), isooxazolyl (e.g., 3-isooxazolyl), etc.

The “aromatic fused cyclic group” used includes a C₈₋₁₄ aromatic fused cyclic group such as naphthyl (e.g., 1-naphthyl, 2-naphthyl), anthryl (e.g., 2-anthryl, 9-anthryl) and the like.

The “aromatic fused heterocyclic group” used includes, for example, a 5- to 14-membered (preferably 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms, or a monovalent group formed by removing one optional hydrogen atom from a 7- to 10-membered aromatic bridged-hetero ring in 5- to 14-membered (preferably 5- to 10-membered) ring containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms. Specific examples of these groups used are quinolyl (e.g., 2-quinolyl, 3-quinolyl, 4-quinolyl, 5-quinolyl, 8-quinolyl), isoquinolyl (e.g., 1-isoquinolyl, 3-isoquinolyl, 4-isoquinolyl, 5-isoquinolyl), indolyl (e.g., 1-indolyl, 2-indolyl, 3-indolyl), 2-benzothiazolyl, benzo[b]thienyl, (e.g., 2-benzo[b]thienyl, 3-benzo[b]thienyl), benzo[b]furanyl (e.g., 2-benzo[b]furanyl, 3-benzo[b]furanyl) and the like.

The “substituent” used for the “aromatic cyclic group” includes a substituent selected from the Substituent group A, which will be later described.

For R¹, there are used hydrogen atom, carbamoylmethyl, 2-carbamoylethyl, hydroxymethyl, 1-hydroxyethyl, benzyl, 4-hydroxybenzyl, 2-pyridylmethyl, 3-pyridylmethyl, 4-pyridylmethyl, 2-thienylmethyl, 3-thienylmethyl, 1-naphthylmethyl, 2-naphthylmethyl, 3-indolemethyl, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, cyclohexylmethyl, phenyl, acetoxymethyl, methoxymethyl, etc., preferably, hydroxymethyl, 1-hydroxyethyl, benzyl, 4-hydroxybenzyl, 3-indolemethyl, methyl, isobutyl, etc., and more preferably, hydroxymethyl, 1-hydroxyethyl, etc.

R² represents (1) hydrogen atom, (2) a cyclic or linear C₁₋₁₀ alkyl group, (3) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (4) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group. Among them, preferred are (1) hydrogen atom, (2) a cyclic or linear C₁₋₁₀ alkyl group, or (3) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group. In particular, (3) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group is preferred.

The cyclic C₁₋₁₀ alkyl group used includes, for example, a C₃₋₈ cycloalkyl group such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.

Examples of the linear C₁₋₁₀ alkyl group include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, nonanyl, decanyl, etc.

The C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group used includes, for example, a C₃₋₇ cycloalkyl-C₁₋₃ alkyl group such as cyclopentylmethyl, cyclohexylmethyl, etc.

Examples of R² include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, cyclohexylmethyl, benzyl, hydroxymethyl, 2-carbamoylethyl, tert-pentyl, etc.; among them, preferred are methyl, ethyl, propyl, isopropyl, isobutyl, sec-butyl, tert-butyl, etc., more preferably, propyl, isopropyl, isobutyl, etc.

R³ represents:

(1) a C₁₋₈ alkyl group having an optionally substituted basic group and optionally having an additional substituent, (2) an aralkyl group having an optionally substituted basic group and optionally having an additional substituent, (3) a C₁₋₄ alkyl group having a non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent, or, (4) a C₁₋₄ alkyl group having a non-aromatic heterocyclic group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent.

The “optionally substituted basic group” used includes, for example, (1) a guanidino group optionally having 1 or 2 substituents from a C₁₋₆ alkyl, a C₁₋₆ acyl (e.g., methyl, ethyl, propyl, isopropyl, butyl, acetyl, propionyl, etc.), etc., (2) an amino group optionally having 1 to 3 substituents from a C₁₋₆ alkyl, a C₁₋₆ acyl (e.g., methyl, ethyl, propyl, isopropyl, butyl, acetyl, propionyl, etc.), etc., (3) a C₁₋₆ alkylcarbonylamino group (e.g., acetamido) optionally substituted with a guanidino group optionally having 1 or 2 substituents from a C₁₋₆ alkyl, a C₁₋₆ acyl (e.g., methyl, ethyl, propyl, isopropyl, butyl, acetyl, propionyl, etc.), etc., (4) a C₁₋₆ alkylcarbonylamino group (e.g., acetamido) optionally substituted with an amino group optionally having 1 to 3 substituents from a C₁₋₆ alkyl, a C₁₋₆ acyl (e.g., methyl, ethyl, propyl, isopropyl, butyl, acetyl, propionyl, etc.), etc. Among them, preferred are guanidino, N-methylguanidino, N,N-dimethylguanidino, N,N′-dimethylguanidino, N-ethylguanidino, N-acetylguanidino, amino, N-methylamino, N,N-dimethylamino, aminoacetamido, guanidinoacetamido, amidino, etc.

The “additional substituent” other than the “optionally substituted basic group” used includes a substituent selected from the Substituent group A later described.

Examples of the “C₁₋₈ alkyl group” used are methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, etc.

The “aralkyl group” used includes, for example, a C₇₋₁₆ aralkyl group such as benzyl, phenethyl, diphenylmethyl, 1-naphthylmethyl, 2-naphthylmethyl, 2,2-diphenylethyl, 3-phenylpropyl, 4-phenylbutyl, 5-phenylpentyl, 2-biphenylylmethyl, 3-biphenylylmethyl, 4-biphenylylmethyl, etc.

The “non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7” used includes, for example, a C₃₋₇ cycloalkyl group such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.

The “non-aromatic heterocyclic group of carbon atoms not greater than 7” used includes, for example, a 5- to 10-membered non-aromatic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 1 to 7 carbon atoms, etc. Specifically examples used are pyrrolidinyl (e.g., 1-pyrrolidinyl, 2-pyrrolidinyl, 3-pyrrolidinyl), oxazolidinyl (e.g., 2-oxazolidinyl), imidazolinyl (e.g., 1-imidazolinyl, 2-imidazolinyl, 4-imidazolinyl), piperidinyl (e.g., 1-piperidinyl, 2-piperidinyl, 3-piperidinyl, 4-piperidinyl), piperazinyl (e.g., 1-piperazinyl, 2-piperazinyl), morpholino, thiomorpholino, etc.

Examples of the “C₁₋₄ alkyl group” used include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, etc.

For R³, there are used, for example, (1) 3-guanidinopropyl, 3-(N-methylguanidino)propyl, 3-(N,N-dimethylguanidino)propyl, 3-(N,N′-dimethylguanidino)propyl, 3-(N-ethylguanidino)propyl, 3-(N-propylguanidino)propyl, 3-(N-acetylguanidino)propyl, 4-guanidinobutyl, 4-(N-methylguanidino)butyl, 2-guanidinoethyl, 2-(N-methylguanidino)ethyl, 4-aminobutyl, 4-(N-methylamino)butyl, 4-(N,N-dimethylamino)butyl, 3-aminopropyl, 2-aminoethyl, aminomethyl, aminoacetamidomethyl, guanidinoacetamidomethyl, 2-(guanidinocarbonyl)ethyl, (2) 4-guanidinobenzyl, 4-aminobenzyl, (3) 4-guanidinocyclohexylmethyl, 4-aminocyclohexylmethyl, (4) 1-amidinopiperidin-4-ylmethyl, 4-pyridylmethyl, etc., preferably, 3-guanidinopropyl, 3-(N-methylguanidino)propyl, 3-(N,N-dimethylguanidino)propyl, 3-(N,N′-dimethylguanidino)propyl, 3-(N-ethylguanidino)propyl, 3-(N-propylguanidino)propyl, 3-(N-acetylguanidino)propyl, 4-guanidinobutyl, 4-(N-methylguanidino)butyl, 2-guanidinoethyl, 2-(N-methylguanidino)ethyl, 4-aminobutyl, 4-(N-methylamino)butyl, 4-(N,N-dimethylamino)butyl, 3-aminopropyl, 2-aminoethyl, 4-aminobenzyl, aminoacetamidomethyl, guanidinoacetamidomethyl, etc., and more preferably, 3-guanidinopropyl, 3-(N-methylguanidino)propyl, 3-(N,N-dimethylguanidino)propyl, 3-(N,N′-dimethylguanidino)propyl, 3-(N-ethylguanidino)propyl, 3-(N-acetylguanidino)propyl, 4-guanidinobutyl, 4-(N-methylguanidino)butyl, 2-guanidinoethyl, 4-aminobutyl, etc.

R⁴ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of:

(1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group; (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group; (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; and preferably, a C₁₋₄ alkyl group substituted with a substituent selected from the group consisting of: (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group; (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group; (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7; and, (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7.

Examples of the “C₁₋₄ alkyl group” used include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, etc.

The “C₆₋₁₂ aromatic hydrocarbon group” used includes, for example, a monocyclic C₆₋₁₂ aromatic hydrocarbon group such as phenyl, cyclooctatetraenyl, etc.

The “5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms” used includes, for example, a 5- to 14-membered, preferably 5- to 10-membered, more preferably 5- or 6-membered monocyclic aromatic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 1 to 7 carbon atoms. Specific examples used are thienyl (e.g., 2-thienyl, 3-thienyl), furyl (e.g., 2-furyl, 3-furyl), pyridyl (e.g., 2-pyridyl, 3-pyridyl, 4-pyridyl), thiazolyl (e.g., 2-thiazolyl, 4-thiazolyl, 5-thiazolyl), oxazolyl (e.g., 2-oxazolyl, 4-oxazolyl), pyrazinyl, pyrimidinyl (e.g., 2-pyrimidinyl, 4-pyrimidinyl), pyrrolyl (e.g., 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl), imidazolyl (e.g., 1-imidazolyl, 2-imidazolyl, 4-imidazolyl), pyrazolyl (e.g., 1-pyrazolyl, 3-pyrazolyl, 4-pyrazolyl), pyridazinyl (e.g., 3-pyridazinyl, 4-pyridazinyl), isothiazolyl (e.g., 3-isothiazolyl), isoxazolyl (e.g., 3-isoxazolyl), etc.

The “C₈₋₁₄ aromatic fused cyclic group” used includes, for example, naphthyl (e.g., 1-naphthyl, 2-naphthyl), anthryl (e.g., 2-anthryl, 9-anthryl), etc.

The “optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms” includes, for example, a 5- to 14-membered (preferably 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms, or a monovalent group formed by removing one optional hydrogen atom from a 7- to 10-membered aromatic bridged-hetero ring in 5- to 14-membered (preferably 5- to 10-membered) ring containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms. Specific examples used are quinolyl (e.g., 2-quinolyl, 3-quinolyl, 4-quinolyl, 5-quinolyl, 8-quinolyl), isoquinolyl (e.g., 1-isoquinolyl, 3-isoquinolyl, 4-isoquinolyl, 5-isoquinolyl), indolyl (e.g., 1-indolyl, 2-indolyl, 3-indolyl), 2-benzothiazolyl, benzo[b]thienyl, (e.g., 2-benzo[b]thienyl, 3-benzo[b]thienyl), benzo[b]furanyl (e.g., 2-benzo[b]furanyl, 3-benzo[b]furanyl), etc.

The “non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7” used includes, for example, a C₃₋₇ cycloalkyl group such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.

The “non-aromatic heterocyclic group of carbon atoms not greater than 7” used includes, for example, a 5- or 10-membered non-aromatic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms, in addition to 1 to 7 carbon atoms, such as pyrrolidinyl (e.g., 1-pyrrolidinyl, 2-pyrrolidinyl, 3-pyrrolidinyl), oxazolidinyl (e.g., 2-oxazolidinyl), imidazolinyl (e.g., 1-imidazolinyl, 2-imidazolinyl, 4-imidazolinyl), piperidinyl (e.g., 1-piperidinyl, 2-piperidinyl, 3-piperidinyl, 4-piperidinyl), piperazinyl (e.g., 1-piperazinyl, 2-piperazinyl), morpholino, thiomorpholino, etc.

The substituents used for these “C₆₋₁₂ aromatic hydrocarbon group,” “5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms,” “C₈₋₁₄ aromatic fused cyclic group,” “5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms,” “non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7” and “non-aromatic heterocyclic group of carbon atoms not greater than 7” include, for example, substituents selected from oxo, a halogen atom (e.g., fluorine, chlorine, bromine, iodine, etc.), C₁₋₃ alkylenedioxy (e.g., methylenedioxy, ethylenedioxy, etc.), nitro, cyano, an optionally substituted C₁₋₆ alkyl, an optionally substituted C₂₋₆ alkenyl, an optionally substituted C₂₋₆ alkynyl, an optionally substituted C₃₋₈ cycloalkyl, an optionally substituted C₆₋₁₄ aryl, an optionally substituted C₇₋₁₆ aralkyl, an optionally substituted C₁₋₆ alkoxy, hydroxy, an optionally substituted C₆₋₁₄ aryloxy, an optionally substituted C₇₋₁₆ aralkyloxy, mercapto, an optionally substituted C₁₋₆ alkylthio, an optionally substituted C₆₋₁₄ arylthio, an optionally substituted C₇₋₁₆ aralkylthio, an optionally substituted amino[amino, an optionally substituted mono- or di-C₁₋₆ alkyl-amino (e.g., methylamino, dimethylamino, ethylamino, diethylamino, propylamino, isopropylamino, etc.), an optionally substituted mono- or di-C₂₋₆ alkenyl-amino (e.g., vinylamino, propenylamino, isopropenylamino), an optionally substituted C₂₋₆ alkynylamino (e.g., 2-butyn-1-yl-amino, 4-pentyn-1-yl-amino, 5-hexyn-1-yl-amino), an optionally substituted mono- or di-C₃₋₈ cycloalkyl-amino (e.g., cyclopropylamino, cyclohexylamino), an optionally substituted C₆₋₁₄ arylamino (e.g., phenylamino, diphenyllamino, naphthylamino), an optionally substituted C₁₋₆ alkoxyamino (e.g., methoxyamino, ethoxyamino, propoxyamino, isopropoxyamino), formylamino, an optionally substituted C₁₋₆ alkylcarbonylamino (e.g., acetylamino, propionylamino, pivaloylamino, etc.), an optionally substituted C₃₋₈ cycloalkylcarbonylamino (e.g., cyclopropylcarbonylamino, cyclopentylcarbonylamino, cyclohexylcarbonylamino, etc.), an optionally substituted C₆₋₁₄ aryl-carbonylamino (e.g., benzoylamino, naphthoylamino, etc.), an optionally substituted C₁₋₆ alkoxy-carbonylamino (e.g., methoxycarbonylamino, ethoxycarbonylamino, propoxycarbonylamino, butoxycarbonylamino, etc.), an optionally substituted C₁₋₆ alkylsulfonylamino (e.g., methylsulfonylamino, ethylsulfonylamino, etc.), an optionally substituted C₆₋₁₄ arylsulfonylamino (e.g., phenylsulfonylamino, 2-naphthylsulfonylamino, 1-naphthylsulfonylamino, etc.)], formyl, carboxy, an optionally substituted C₁₋₆ alkylcarbonyl (e.g., acetyl, propionyl, pivaloyl, etc.), an optionally substituted C₃₋₈ cycloalkylcarbonyl (e.g., cyclopropylcarbonyl, cyclopentylcarbonyl, cyclohexylcarbonyl, 1-methyl-cyclohexyl-carbonyl, etc.), an optionally substituted C₆₋₁₄ aryl-carbonyl (e.g., benzoyl, 1-naphthoyl, 2-naphthoyl, etc.), an optionally substituted C₇₋₁₆ aralkylcarbonyl (e.g., phenylacetyl, 3-phenylpropionyl, etc.), an optionally substituted 5- to 7-membered heterocyclic carbonyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., nicotinoyl, isonicotinoyl, thenoyl, furoyl, morpholinocarbonyl, thiomorpholinocarbonyl, piperazin-1-ylcarbonyl, pyrrolidin-1-ylcarbonyl, etc.), an optionally esterified carboxyl, an optionally substituted carbamoyl group, an optionally substituted C₁₋₆ alkylsulfonyl (e.g., methylsulfonyl, ethylsulfonyl, etc.), an optionally substituted C₁₋₆ alkylsulfinyl (e.g., methylsulfinyl, ethylsulfinyl, etc.), an optionally substituted C₆₋₁₄ arylsulfonyl (e.g., phenylsulfonyl, 1-naphthylsulfonyl, 2-naphthylsulfonyl, etc.), an optionally substituted C₆₋₁₄ arylsulfinyl (e.g., phenylsulfinyl, 1-naphthylsulfinyl, 2-naphthylsulfinyl, etc.), an optionally substituted C₁₋₆ alkylcarbonyloxy (e.g., acetoxy, propionyloxy, etc.), an optionally substituted C₆₋₁₄ aryl-carbonyloxy (e.g., benzoyloxy, naphthylcarbonyloxy, etc.), an optionally substituted C₁₋₆ alkoxy-carbonyloxy (e.g., methoxycarbonyloxy, ethoxycarbonyloxy, propoxycarbonyloxy, butoxycarbonyloxy, etc.), an optionally substituted a mono-C₁₋₆ alkylcarbamoyloxy (e.g., methylcarbamoyloxy, ethylcarbamoyloxy, etc.), an optionally substituted di-C₁₋₆ alkylcarbamoyloxy (e.g., dimethylcarbamoyloxy, diethylcarbamoyloxy, etc.), an optionally substituted a mono- or di-C₆₋₁₄ arylcarbamoyloxy (e.g., phenylcarbamoyloxy, naphthylcarbamoyloxy, etc.), an optionally substituted heterocyclic group, sulfo, sulfamoyl, sulfinamoyl, sulfenamoyl, or a group of 2 or more (e.g., 2 or 3) of these substituents combined, and the like (Substituent group A). The number of the substituents is not particularly limited but these rings may have 1 to 5, preferably 1 to 3 substituents in substitutable positions, and when there are two or more substituents, each substituent may be the same or different.

The “optionally esterified carboxyl used in the Substituent group A includes, for example, an optionally substituted C₁₋₆ alkoxy-carbonyl (e.g., methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, tert-butoxycarbonyl, etc.), an optionally substituted C₆₋₁₄ aryloxy-carbonyl (e.g., phenoxycarbonyl, etc.), an optionally substituted C₇₋₁₆ aralkyloxy-carbonyl (e.g., benzyloxycarbonyl, phenethyloxycarbonyl, etc.), and the like.

The “C₁₋₆ alkyl” in the “optionally substituted C₁₋₆ alkyl” used in the Substituent group A includes, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, etc.

The “C₂₋₆ alkenyl” in the “optionally substituted C₂₋₆ alkenyl” used in the Substituent group A includes, for example, vinyl, propenyl, isopropenyl, 2-buten-1-yl, 4-penten-1-yl, 5-hexen-1-yl, etc.

The “C₂₋₆ alkynyl” in the “optionally substituted C₂₋₆ alkynyl” used in the Substituent group A includes, for example, 2-butyn-1-yl, 4-pentyn-1-yl, 5-hexyn-1-yl, etc.

The “C₃₋₈ cycloalkyl” in the “optionally substituted C₃₋₈ cycloalkyl” used in the Substituent group A includes, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.

The C₆₋₁₄ aryl in the optionally substituted C₆₋₁₄ aryl used in the Substituent group A includes, for example, phenyl, 1-naphthyl, 2-naphthyl, 2-biphenylyl, 3-biphenylyl, 4-biphenylyl, 2-anthryl, etc.

The “C₇₋₁₆ aralkyl” in the “optionally substituted C₇₋₁₆ aralkyl” used in the Substituent group A includes, for example, benzyl, phenethyl, diphenyllmethyl, 1-naphthylmethyl, 2-naphthylmethyl, 2,2-diphenyllethyl, 3-phenylpropyl, 4-phenylbutyl, 5-phenylpentyl, 2-biphenylylmethyl, 3-biphenylylmethyl, 4-biphenylylmethyl), etc.

The “C₁₋₆ alkoxy” in the “optionally substituted C₁₋₆ alkoxy” used in the Substituent group A includes, for example, methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, pentyloxy, hexyloxy, etc.

The “C₆₋₁₄ aryloxy” in the “optionally substituted C₆₋₁₄ aryloxy” used in the Substituent group A includes, for example, phenyloxy, 1-naphthyloxy, 2-naphthyloxy, etc.

The “C₇₋₁₆ aralkyloxy” in the “optionally substituted C₇₋₁₆ aralkyloxy” used in the Substituent group A includes, for example, benzyloxy, phenethyloxy, etc.

The “C₁₋₆ alkylthio” in the “optionally substituted C₁₋₆ alkylthio” used in the Substituent group A includes, for example, methylthio, ethylthio, propylthio, isopropylthio, butylthio, sec-butylthio, tert-butylthio, etc.

The “C₆₋₁₄ arylthio” in the “optionally substituted C₆₋₁₄ arylthio” used in the Substituent group A includes, for example, phenylthio, 1-naphthylthio, 2-naphthylthio, etc.

The “C₇₋₁₆ aralkylthio” in the “optionally substituted C₇₋₁₆ aralkylthio” used in the Substituent group A includes, for example, benzylthio, phenethylthio, etc.

The substituents used in the Substituent group A for these “C₁₋₆ alkoxy-carbonyl,” “C₁₋₆ alkyl group,” “C₂₋₆ alkenyl,” “C₂₋₆ alkynyl,” “C₁₋₆ alkoxy,” “C₁₋₆ alkylthio,” C₁₋₆ alkyl-amino,” C₂₋₆ alkenyl-amino,” “C₂₋₆ alkynylamino,” C₁₋₆ alkoxyamino,” “C₁₋₆ alkylcarbonyl,” “C₁₋₆ alkylsulfonyl,” “C₁₋₆ alkylsulfinyl,” “C₁₋₆ alkylcarbonylamino,” “C₁₋₆ alkoxy-carbonylamino,” “C₁₋₆ alkylsulfonylamino,” “C₁₋₆ alkylcarbonyloxy,” “C₁₋₆ alkoxy-carbonyloxy,” “mono-C₁₋₆ alkylcarbamoyloxy” and “di-C₁₋₆ alkylcarbamoyloxy” include 1 to 5 substituents selected from, for example, a halogen atom (e.g., fluorine atom, chlorine atom, bromine atom, iodine atom), carboxy, hydroxy, amino, a mono- or di-C₁₋₆ alkylamino, a mono- or di-C₆₋₁₄ arylamino, a C₃₋₈ cycloalkyl, a C₁₋₆ alkoxy, a C₁₋₆ alkoxy-carbonyl, a C₁₋₆ alkylthio, a C₁₋₆ alkylsulfinyl, a C₁₋₆ alkylsulfonyl, the optionally esterified carboxyl described above, carbamoyl, thiocarbamoyl, a mono-C₁₋₆ alkylcarbamoyl (e.g., methylcarbamoyl, ethylcarbamoyl, etc.), a di-C₁₋₆ alkylcarbamoyl (e.g., dimethylcarbamoyl, diethylcarbamoyl, ethylmethylcarbamoyl, etc.), a mono- or di-C₆₋₁₄ arylcarbamoyl (e.g., phenylcarbamoyl, 1-naphthylcarbamoyl, 2-naphthylcarbamoyl, etc.), a mono- or di-5- to 7-membered heterocyclic carbamoyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 2-pyridylcarbamoyl, 3-pyridylcarbamoyl, 4-pyridylcarbamoyl, 2-thienylcarbamoyl, 3-thienylcarbamoyl, etc.) and the like.

The substituents used in the Substituent group A for the “C₆₋₁₄ aryloxy-carbonyl,” “C₇₋₁₆ aralkyloxy-carbonyl,” “C₃₋₈ cycloalkyl,” “C₆₋₁₄ aryl,” “C₇₋₁₆ aralkyl,” “C₆₋₁₄ aryloxy,” “C₇₋₁₆ aralkyloxy,” “C₆₋₁₄ arylthio,” “C₇₋₁₆ aralkylthio,” C₃₋₈ cycloalkyl-amino, C₆₋₁₄ arylamino, “C₃₋₈ cycloalkylcarbonyl,” “C₆₋₁₄ aryl-carbonyl,” “C₇₋₁₆ aralkylcarbonyl,” “5- to 7-membered heterocyclic carbonyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms,” “C₆₋₁₄ arylsulfonyl,” “C₆₋₁₄ arylsulfinyl,” “C₃₋₈ cycloalkylcarbonylamino,” “C₆₋₁₄ aryl-carbonylamino,” “C₆₋₁₄ arylsulfonylamino,” “C₆₋₁₄ aryl-carbonyloxy” and “mono- or di-C₆₋₁₄ arylcarbamoyloxy” include 1 to 5 substituents selected from, for example, a halogen atom, hydroxy, carboxy, nitro, cyano, the optionally substituted C₁₋₆ alkyl described above, the optionally substituted C₂₋₆ alkenyl described above, the optionally substituted C₂₋₆ alkynyl described above, the optionally substituted C₃₋₈ cycloalkyl described above, the optionally substituted C₁₋₆ alkoxy described above, the optionally substituted C₁₋₆ alkylthio described above, the optionally substituted C₁₋₆ alkylsulfinyl described above, the optionally substituted C₁₋₆ alkylsulfonyl described above, the optionally esterified carboxyl described above, carbamoyl, thiocarbamoyl, a mono-C₁₋₆ alkylcarbamoyl, a di-C₁₋₆ alkylcarbamoyl, a mono- or di-C₆₋₁₄ arylcarbamoyl, a mono- or di-5- to 7-membered heterocyclic carbamoyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms, and the like.

The “optionally substituted heterocyclic group” used in the Substituent group A includes, for example, a 5- to 14-membered (monocyclic, bicyclic or tricyclic) heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms, which may optionally be substituted with a halogen atom, hydroxy, carboxy, nitro, cyano, the optionally substituted C₁₋₆ alkyl described above, the optionally substituted C₂₋₆ alkenyl described above, the optionally substituted C₂₋₆ alkynyl described above, the optionally substituted C₃₋₈ cycloalkyl described above, the optionally substituted C₆₋₁₄ aryl described above, the optionally substituted C₁₋₆ alkoxy described above, the optionally substituted C₁₋₆ alkylthio described above, the optionally substituted C₆₋₁₄ arylthio described above, the optionally substituted C₇₋₁₆ aralkylthio described above, the optionally substituted C₁₋₆ alkylsulfinyl described above, the optionally substituted C₆₋₁₄ arylsulfinyl described above, the optionally substituted C₁₋₆ alkylsulfonyl described above, the optionally substituted C₆₋₁₄ arylsulfonyl described above, the optionally esterified carboxyl described above, carbamoyl, thiocarbamoyl, a mono-C₁₋₆ alkylcarbamoyl, a di-lower alkylcarbamoyl, a mono- or di-C₆₋₁₄ arylcarbamoyl, a mono- or di-5- or 7-membered heterocyclic carbamoyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms, or the like; preferably (i) a 5- to 14-membered (preferably, 5- to 10-membered) aromatic heterocyclic group, (ii) a 5- to 10-membered non-aromatic heterocyclic group or (iii) a monovalent group formed by removing one optional hydrogen atom from 7- to 10-membered bridged-hetero ring, and more preferably, a 5-memberedaromatic heterocyclic group. Specifically used are an aromatic heterocyclic group such as thienyl (e.g., 2-thienyl, 3-thienyl), furyl (e.g., 2-furyl, 3-furyl), pyridyl (e.g., 2-pyridyl, 3-pyridyl, 4-pyridyl), thiazolyl (e.g., 2-thiazolyl, 4-thiazolyl, 5-thiazolyl), oxazolyl (e.g., 2-oxazolyl, 4-oxazolyl), quinolyl (e.g., 2-quinolyl, 3-quinolyl, 4-quinolyl, 5-quinolyl, 8-quinolyl), isoquinolyl (e.g., 1-isoquinolyl, 3-isoquinolyl, 4-isoquinolyl, 5-isoquinolyl), pyrazinyl, pyrimidinyl (e.g., 2-pyrimidinyl, 4-pyrimidinyl), pyrrolyl (e.g., 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl), imidazolyl (e.g., 1-imidazolyl, 2-imidazolyl, 4-imidazolyl), pyrazolyl (e.g., 1-pyrazolyl, 3-pyrazolyl, 4-pyrazolyl), pyridazinyl (e.g., 3-pyridazinyl, 4-pyridazinyl), isothiazolyl (e.g., 3-isothiazolyl), isoxazolyl (e.g., 3-isoxazolyl), indolyl (e.g., 1-indolyl, 2-indolyl, 3-indolyl), 2-benzothiazolyl, benzo[b]thienyl, (e.g., 2-benzo[b]thienyl, 3-benzo[b]thienyl), benzo[b]furanyl (e.g., 2-benzo[b]furanyl, 3-benzo[b]furanyl), etc., a non-aromatic heterocyclic group such as pyrrolidinyl (e.g., 1-pyrrolidinyl, 2-pyrrolidinyl, 3-pyrrolidinyl), oxazolidinyl (e.g., 2-oxazolidinyl), imidazolinyl (e.g., 1-imidazolinyl, 2-imidazolinyl, 4-imidazolinyl), piperidinyl (e.g., 1-piperidinyl, 2-piperidinyl, 3-piperidinyl, 4-piperidinyl), piperazinyl (e.g., 1-piperazinyl, 2-piperazinyl), morpholino, thiomorpholino, etc.

The “optionally substituted carbamoyl group” used in the Substituent group A includes a carbamoyl group, which may optionally be substituted with the optionally substituted C₁₋₆ alkyl described above, an optionally substituted C₂₋₆ alkenyl, an optionally substituted C₂₋₆ alkynyl, an optionally substituted C₃₋₈ cycloalkyl, an optionally substituted C₆₋₁₄ aryl, an optionally substituted heterocyclic group, etc., and specific examples are carbamoyl, thiocarbamoyl, a mono-C₁₋₆ alkylcarbamoyl (e.g., methylcarbamoyl, ethylcarbamoyl, etc.), di-C₁₋₆ alkylcarbamoyl (e.g., dimethylcarbamoyl, diethylcarbamoyl, ethylmethylcarbamoyl, etc.), C₁₋₆ alkyl(C₁₋₆ alkoxy)carbamoyl (e.g., methyl(methoxy)carbamoyl, ethyl(methoxy)carbamoyl), a mono- or di-C₆₋₁₄ arylcarbamoyl (e.g., phenylcarbamoyl, 1-naphthylcarbamoyl, 2-naphthylcarbamoyl, etc.), a mono- or di-5- to 7-memberedheterocyclic carbamoyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 2-pyridylcarbamoyl, 3-pyridylcarbamoyl, 4-pyridylcarbamoyl, 2-thienylcarbamoyl, 3-thienylcarbamoyl, etc.), a 5- to 7-membered cyclic carbamoyl (e.g., 1-pyrrolidinylcarbonyl, 1-piperidinylcarbonyl, hexamethyleneiminocarbonyl), and the like.

The “optionally substituted amino” used in the Substituent group A includes an amino, which may optionally be substituted with 1 or 2 groups selected from the optionally substituted C₁₋₆ alkyl, the optionally substituted C₂₋₆ alkenyl described above, the optionally substituted C₂₋₆ alkynyl described above, the optionally substituted C₃₋₈ cycloalkyl described above, the optionally substituted C₆₋₁₄ aryl described above, the optionally substituted C₁₋₆ alkoxy described above described above, formyl, the optionally substituted C₁₋₆ alkylcarbonyl described above, the optionally substituted C₃₋₈ cycloalkylcarbonyl described above, the optionally substituted C₆₋₁₄ aryl-carbonyl described above, the optionally substituted C₁₋₆ alkoxy-carbonyl described above, the optionally substituted C₁₋₆ alkylsulfonyl described above, an optionally substituted C₆₋₁₄ arylsulfonyl) and the like.

More preferably, the substituents for the “C₆₋₁₂ aromatic hydrocarbon group,” “5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms,” “C₈₋₁₄ aromatic fused cyclic group,” “5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms,” “non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7” and “non-aromatic heterocyclic group of carbon atoms not greater than 7” are a halogen atom, hydroxy, a C₁₋₆ alkoxy, an optionally halogenated C₁₋₆ alkyl, an optionally halogenated C₁₋₆ alkoxy, amino, nitro, cyano, etc.

Examples of R⁴ used include:

(1) “a C₁₋₄ alkyl group having an optionally substituted C₆₋₁₂ aromatic hydrocarbon group” such as benzyl, 2-fluorobenzyl, 3-fluorobenzyl, 4-fluorobenzyl, 4-chlorobenzyl, 3,4-difluorobenzyl, 3,4-dichlorobenzyl, pentafluorobenzyl, 4-hydroxybenzyl, 4-methoxybenzyl, 3-trifluoromethylbenzyl, 4-aminobenzyl, 4-nitrobenzyl, 4-cyanobenzyl, phenethyl, etc.; (2) “a C₁₋₄ alkyl group having an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms” such as 2-pyridylmethyl, 3-pyridylmethyl, 4-pyridylmethyl, 2-thienylmethyl, 3-thienylmethyl, 4-thiazolylmethyl, etc.; (3) “a C₁₋₄ alkyl group having an optionally substituted C₈₋₁₄ aromatic fused cyclic group” such as 1-naphthylmethyl, 2-naphthylmethyl, inden-2-ylmethyl, etc.; (4) “a C₁₋₄ alkyl group having an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms” such as 3-indolemethyl, 1-formylindol-3-ylmethyl, 3-benzo[b]thienylmethyl, 2-quinolylmethyl, etc.; (5) “a C₁₋₄ alkyl group having an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7” such as cyclohexylmethyl, cyclopentylmethyl, indan-2-ylmethyl, etc.; (6) “a C₁₋₄ alkyl group having an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7” such as 4-piperidinylmethyl, tetrahydrofurfuryl, tetrahydrofuran-2-yl, tetrahydropyran-3-yl, indolin-3-yl, etc., preferably, benzyl, 2-fluorobenzyl, 3-fluorobenzyl, 4-fluorobenzyl, 4-hydroxybenzyl, 4-aminobenzyl, 4-nitrobenzyl, 4-chlorobenzyl, 4-methoxybenzyl, 4-cyanobenzyl, 3-trifluoromethylbenzyl, 3,4-dichlorobenzyl, 3,4-difluorobenzyl, pentafluorobenzyl, 3-pyridylmethyl, 4-pyridylmethyl, 3-indolemethyl, 1-formylindol-3-ylmethyl, 3-benzo[b]thienylmethyl, 2-quinolylmethyl, 1-naphthylmethyl, 2-naphthylmethyl, cyclohexylmethyl, phenethyl, etc., and more preferably, benzyl, 2-fluorobenzyl, 3-fluorobenzyl, 4-fluorobenzyl, 4-hydroxybenzyl, 4-aminobenzyl, 4-nitrobenzyl, 4-chlorobenzyl, 4-methoxybenzyl, 4-cyanobenzyl, 3-trifluoromethylbenzyl, 3,4-dichlorobenzyl, 3,4-difluorobenzyl, pentafluorobenzyl, 3-pyridylmethyl, 4-pyridylmethyl, 3-indolemethyl, 3-benzo[b]thienylmethyl, 1-naphthylmethyl, 2-naphthylmethyl, cyclohexylmethyl, etc.

Q¹ represents a C₁₋₄ alkyl group optionally substituted with a substituent selected from the group consisting of:

(1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group; (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group; (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7; and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; and the same substituents as in R⁴ are used.

Examples of Q¹ include:

(1) “a C₁₋₄ alkyl group having an optionally substituted C₆₋₁₂ aromatic hydrocarbon group” such as benzyl, 2-fluorobenzyl, 3-fluorobenzyl, 4-fluorobenzyl, 4-chlorobenzyl, 3,4-difluorobenzyl, 3,4-dichlorobenzyl, pentafluorobenzyl, 4-hydroxybenzyl, 4-methoxybenzyl, 4-trifluoromethylbenzyl, 4-aminobenzyl, 4-nitrobenzyl, 4-cyanobenzyl, phenethyl, etc.; (2) “a C₁₋₄ alkyl group having an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms” such as 2-pyridylmethyl, 3-pyridylmethyl, 4-pyridylmethyl, 2-thienylmethyl, 3-thienylmethyl, 4-thiazolylmethy, etc.; (3) “a C₁₋₄ alkyl group having optionally substituted C₈₋₁₄ aromatic fused cyclic group,” such as 1-naphthylmethyl, 2-naphthylmethyl, inden-2-ylmethyl; (4) “a C₁₋₄ alkyl group having an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms” such as 3-indolemethyl, 1-formylindol-3-ylmethyl, 3-benzo[b]thienylmethyl, 2-quinolylmethyl, etc.; (5) “a C₁₋₄ alkyl group having an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7” such as cyclohexylmethyl, cyclopentylmethyl, indan-2-ylmethyl, etc.; (6) “a C₁₋₄ alkyl group having an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7” such as 4-piperidinylmethyl, tetrahydrofurfuryl, tetrahydrofuran-2-yl, tetrahydropyran-3-yl, indolin-3-yl, etc.; preferably, cyclohexylmethyl, benzyl, 4-fluorobenzyl, 4-hydroxybenzyl, 4-methoxybenzyl, pentafluorobenzyl, 2-pyridylmethyl, 4-pyridylmethyl, 1-naphthylmethyl, 2-naphthylmethyl, 3-indolemethyl, 2-thienylmethyl, etc. and more preferably, benzyl, 4-fluorobenzyl, cyclohexylmethyl, etc.

Q² represents (1) CH₂, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, (2) NH, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, or (3) O.

Examples of the “C₁₋₄ alkyl group” used are methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, etc.

Preferably, Q² is CH₂, CH(CH₃), CH(CH₂OH), NH, or the like.

Y represents a group represented by formula: —CONH—, —CSNH—, —CH₂NH—, —NHCO—, —CH₂O—, —CH₂S—, —COO—, —CSO—, —CH₂CH₂—, or —CH═CH—, which may optionally be substituted with a C₁₋₆ alkyl group.

Examples of the “C₁₋₆ alkyl group” used are methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, etc.

Preferably, Y is a group represented by formula: —CONH—, —CSNH—, —NHCO—, —CH₂NH—, —CH₂O—, —COO— or —CSO— (more preferably, the group represented by formula: —CONH—, —CSNH—, —NHCO— or —CH₂NH—).

Z⁹ represents hydrogen atom, O or S, preferably O or S;

wherein, when Z⁹ represents hydrogen atom, a structure of the moiety represented by >C=Z⁹ indicates a structure of >CH₂.

P and P′, which may be the same or different, each may form a ring by combining P and P′ or P and Q¹ together and represents:

(1) hydrogen atom; (2) an optional amino acid residue continuously or discontinuously bound from the C terminus of the 1-48 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1; (3) a group represented by formula: J¹-J²-C(J³)(Q³)Y¹C(J⁴)(Q⁴)Y²C(J⁵)(Q⁵)Y³C(J⁶)(Q⁶)C(=Z¹⁰)- (wherein each symbol has the same significance as described above); (4) a group represented by formula: -J¹-J²-C(J⁷)(Q⁷)Y²C(J⁸)(Q⁸)Y³C(J⁹)(Q⁹)C(=Z¹⁰)- (wherein each symbol has the same significance as described above); (5) a group represented by formula: J¹-J²-C(J¹⁰)(Q¹⁰)Y³C(J¹¹)(Q¹¹)C(=Z¹⁰)- (wherein each symbol has the same significance as described above); (6) a group represented by formula: J¹-J²-C(J¹²)(Q¹²)C(=Z¹⁰)- (wherein each symbol has the same significance as described above); or, (7) a group represented by formula: J¹ (wherein J¹ has the same significance as described above).

Specific examples of the “optional amino acid residue continuously or discontinuously bound from the C terminus of the 1-48 amino acid sequence represented by SEQ ID NO: 1” used include:

(1) Asn- (2) Trp Asn-, (3) Asn Trp Asn-, (4) Tyr Asn Trp Asn-, (5) Asn Tyr Asn Trp Asn-, (6) Pro Asn Tyr Asn Trp Asn-, (7) Leu Pro Asn Tyr Asn Trp Asn-, (8) Asp Leu Pro Asn Tyr Asn Trp Asn-, (9) Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (10) Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (11) Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (12) Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (13)Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (14) Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (15) Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (16) Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (17) Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (18) Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (19) Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (20) Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (21) Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (22) Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (23) Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (24) Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (25) Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (26) His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (27) Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (28) Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (29) Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (30) Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (31) Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (32) Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (33) Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (34) Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (35) Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (36) Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (37) Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (38) Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (39) Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (40) Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (41) Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (42) Pro Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (43) Pro Pro Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (44) Ser Pro Pro Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (45) Leu Ser Pro Pro Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (46) Ser Leu Ser Pro Pro Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (47) Thr Ser Leu Ser Pro Pro Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, (48) Gly Thr Ser Leu Ser Pro Pro Pro Glu Ser Ser Gly Ser Arg Gln Gln Pro Gly Leu Ser Ala Pro His Ser Arg Gln Ile Pro Ala Pro Gln Gly Ala Val Leu Val Gln Arg Glu Lys Asp Leu Pro Asn Tyr Asn Trp Asn-, etc.

J¹ represents (a) hydrogen atom or (b) (i) a C₁₋₁₅ acyl group, (ii) a C₁₋₁₅ alkyl group, (iii) a C₆₋₁₄ aryl group, (iv) carbamoyl group, (v) carboxyl group, (vi) sulfino group, (vii) amidino group, (viii) glyoxyloyl group or (ix) amino group, which groups may optionally be substituted with a substituent containing an optionally substituted cyclic group.

The “cyclic group” used includes, for example, “an optionally substituted an aromatic hydrocarbon group,” “an optionally substituted aromatic heterocyclic group,” “an optionally substituted an aromatic fused cyclic group,” “an optionally substituted an aromatic fused heterocyclic group,” “an optionally substituted non-aromatic cyclic hydrocarbon group,” “an optionally substituted non-aromatic heterocyclic group”, etc., and as the “aromatic hydrocarbon group,” “aromatic heterocyclic group,” “aromatic fused cyclic group” and “aromatic fused heterocyclic group,” the same groups given above are used.

The “non-aromatic cyclic hydrocarbon group” used includes, for example, a C₃₋₈ cycloalkyl group such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.

The “non-aromatic heterocyclic group” used includes, for example, a 5- or 10-membered non-aromatic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 1 to 7 carbon atoms such as pyrrolidinyl (e.g., 1-pyrrolidinyl, 2-pyrrolidinyl, 3-pyrrolidinyl), oxazolidinyl (e.g., 2-oxazolidinyl), imidazolinyl (e.g., 1-imidazolinyl, 2-imidazolinyl, 4-imidazolinyl), piperidinyl (e.g., 1-piperidinyl, 2-piperidinyl, 3-piperidinyl, 4-piperidinyl), piperazinyl (e.g., 1-piperazinyl, 2-piperazinyl), morpholino, thiomorpholino, etc.

The substituent optionally present on the “cyclic group” includes the same substituents given for the Substituent group A described above.

The “C₁₋₁₅ acyl group” used includes, for example, formyl, a C₁₋₁₄ alkylcarbonyl (e.g., a C₁₋₆ alkylcarbonyl such as acetyl, propionyl, pivaloyl, etc.) and the like.

Examples of the “C₁₋₁₅ alkyl group” used include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, nonanyl, decanyl, etc.

Examples of the “C₆₋₁₄ aryl group” used include phenyl, 1-naphthyl, 2-naphthyl, biphenyl, etc.

(1) The C₁₋₁₅ acyl group, which may optionally be substituted with a substituent containing a cyclic group, includes (i) formyl, (ii) a C₁₋₁₄ alkylcarbonyl (e.g., a C₁₋₆ alkylcarbonyl such as acetyl, propionyl, pivaloyl, etc.), (iii) a C₃₋₈ cycloalkylcarbonyl (e.g., cyclopropylcarbonyl, cyclopentylcarbonyl, cyclohexylcarbonyl, 1-methylcyclohexylcarbonyl, etc.), (iv) a C₃₋₈ cycloalkyl-C₁₋₆ alkylcarbonyl (e.g., cyclopropylacetyl, cyclopentylacetyl, cyclohexylacetyl, etc.), (v) a C₆₋₁₄ aryl-carbonyl (e.g., benzoyl, 1-naphthoyl, 2-naphthoyl, etc.), a C₆₋₁₄ aralkylcarbonyl (e.g., phenylacetyl, 3-phenylpropionyl, etc.), (vi) a 5- to 7-membered monocyclic heterocyclic carbonyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., nicotinoyl, isonicotinoyl, thenoyl, furoyl, morpholinocarbonyl, thiomorpholinocarbonyl, piperazin-1-ylcarbonyl, pyrrolidin-1-ylcarbonyl, etc.), (vii) a 5- to 7-membered monocyclic heterocyclic-C₁₋₆ alkylcarbonyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 3-pyridylacetyl, 4-pyridylacetyl, 2-thienylacetyl, 2-furylacetyl, morpholinoacetyl, thiomorpholinoacetyl, piperidin-2-acetyl, pyrrolidine-2-ylacetyl, etc.), (viii) a 5- to 14-membered (preferably, 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic carbonyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms (e.g., 2-indolecarbonyl, 3-indolecarbonyl, 2-quinolylcarbonyl, 1-isoquinolylcarbonyl, 2-benzo[b]thienylcarbonyl, 2-benzo[b]furanylcarbonyl, etc.), (ix) a 5- to 14-membered (preferably 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic-C₁₋₆ alkylcarbonyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms (e.g., 2-indoleacetyl, 3-indoleacetyl, 2-quinolylacetyl, 1-isoquinolylacetyl, 2-benzo[b]thienylacetyl, 2-benzo[b]furanylacetyl, etc.), etc., preferably, acetyl, 2-indolecarbonyl, 3-indolecarbonyl, 3-indoleacetyl, 3-indolepropionyl, 2-indolinecarbonyl, 3-phenylpropionyl, diphenylacetyl, 2-pyridinecarbonyl, 3-pyridinecarbonyl, 4-pyridinecarbonyl, 1-pyridinioacetyl, 2-pyridineacetyl, 3-pyridineacetyl, 4-pyridineacetyl, 3-(1-pyridinio)propionyl, 3-(pyridin-2-yl)propionyl, 3-(pyridin-3-yl)propionyl, 3-(pyridin-4-yl)propionyl, 4-imidazoleacetyl, cyclohexanecarbonyl, 1-piperidineacetyl, 1-methyl-1-piperidinioacetyl, 4-piperidinecarbonyl, 2-pyrimidinecarbonyl, 4-pyrimidinecarbonyl, 5-pyrimidinecarbonyl, 2-pyrimidineacetyl, 4-pyrimidineacetyl, 5-pyrimidineacetyl, 3-(pyrimidine-2-yl)propionyl, 3-(pyrimidine-4-yl)propionyl, 3-(pyrimidine-5-yl)propionyl, butanoyl, hexanoyl, octanoyl, D-glucuronyl, amino-(4-hydroxyphenyl)acetyl), etc.

(2) The C₁₋₁₅ alkyl group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, (i) a mono- or di-C₁₋₁₅ alkyl (e.g., methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, nonanyl, decanyl), (ii) a mono- or di-C₃₋₈ cycloalkyl (e.g., cyclopropyl, cyclopentyl, etc.), (iii) a mono- or di-C₃₋₈ cycloalkyl-C₁₋₇ alkyl (e.g., cyclopropylmethyl, cyclopentylmethyl, cyclohexylethyl, etc.), (iv) a mono- or di-C₇₋₁₅ aralkyl (e.g., benzyl, phenethyl, etc.), (v) a mono- or di-5- to 7-membered monocyclic heterocyclic-C₁₋₆ alkyl group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 3-pyridylmethyl, 4-pyridylmethyl, 2-thienylmethyl, furfuryl, etc.), (vi) a mono- or di-5- to 14-membered (preferably, 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic-C₁₋₆ alkyl group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms (e.g., 2-indolemethyl, 3-indolemethyl, 3-(indol-3-yl)propyl, 2-quinolylmethyl, 1-isoquinolylmethyl, 2-benzo[b]thienylmethyl, 2-benzo[b]furanylmethyl, etc.), etc., preferably, methyl, ethyl, benzyl, 3-(indol-3-yl)propyl, etc.

(3) The C₆₋₁₄ aryl group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, a C₆₋₁₄ aryl group (e.g., phenyl, naphthyl, biphenyl), which may optionally be substituted with (i) a C₆₋₁₄ carbocyclic group (e.g., cycloalkyl, phenyl, 1-naphthyl, 2-naphthyl, etc.), (ii) a 5- to 7-membered monocyclic heterocyclic group containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 3-pyridyl, 2-thienyl, etc.), (iii) a 5- to 14-membered containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms (preferably, 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic group (e.g., 2-indolyl, 3-indolyl, 2-quinolyl, 1-isoquinolyl, 2-benzo[b]thienyl, 2-benzo[b]furanyl, etc.), etc.

(4) The optionally substituted carbamoyl group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, (i) carbamoyl, (ii) a mono- or di-C₁₋₁₅ alkylcarbamoyl group (e.g., methylcarbamoyl, ethylcarbamoyl, (iii) a mono- or di-C₃₋₈ cycloalkyl-carbamoyl (e.g., cyclopropylcarbamoyl, cyclopentylcarbamoyl, cyclohexylcarbamoyl, etc.), (iv) a mono- or di-C₃₋₈ cycloalkyl-C₁₋₆ alkyl-carbamoyl (e.g., cyclopropylmethylcarbamoyl, cyclopentylmethylcarbamoyl, 2-cyclohexylethylcarbamoyl, etc.) (v) a mono- or di-C₆₋₁₄ aryl-carbamoyl (e.g., phenylcarbamoyl, etc.), a mono- or di-C₆₋₁₄ aralkyl-carbamoyl (e.g., benzylcarbamoyl, phenethylcarbamoyl, etc.), (vi) a mono- or di-5- to 7-membered monocyclic heterocyclic carbamoyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 3-pyridinecarbamoyl, 2-thiophenecarbamoyl, piperidin-3-ylcarbamoyl, etc.), (vii) a mono- or di-5- to 7-membered monocyclic heterocyclic-C₁₋₆ alkylcarbamoyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to carbon atoms (e.g., 3-pyridylmethylcarbamoyl, 2-(pyridin-2-yl)ethylcarbamoyl, 2-(piperidin-1-yl)ethylcarbamoyl, etc.), (viii) a mono- or di-5- to 14-membered containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms (preferably, 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic carbamoyl (e.g., 4-indolecarbamoyl, 5-indolecarbamoyl, 3-quinolylcarbamoyl, 5-quinolylcarbamoyl, etc.), (ix) a mono- or di-5- to 14-membered (preferably, 5- to 10-membered) bicyclic or tricyclic aromatic heterocyclic-C₁₋₆ alkylcarbonyl containing 1 to 4 hetero atoms of 1 or 2 species selected from nitrogen, sulfur and oxygen atoms in addition to 3 to 11 carbon atoms (e.g., benzimidazole-2-ylmethylcarbamoyl, 2-(indol-3-yl)ethylcarbamoyl, etc.), (x) a 5- to 7-membered cyclic carbamoyl (e.g., 1-pyrrolidinylcarbonyl, 1-piperidinylcarbonyl, hexamethyleneiminocarbonyl, etc.), (xi) a C₁₋₁₅ acylcarbamoyl (the C₁₋₁₅ acyl herein has the same significance as for the “C₁₋₁₅ acyl group” in the “C₁₋₁₅ acyl group used, which may optionally be substituted with a substituent containing a cyclic group”), (xii) a C₁₋₁₅ alkylaminocarbamoyl (the C₁₋₁₅ alkyl herein has the same significance as for the “C₁₋₁₅ alkyl group” in the “C₁₋₁₅ alkyl group, which may optionally be substituted with a substituent containing a cyclic group”), (xiii) a C₆₋₁₄ arylaminocarbamoyl (the C₆₋₁₄ aryl group herein has the same significance as for the “C₆₋₁₄ aryl group, which may optionally be substituted with a substituent containing a cyclic group”), etc., preferably, 2-(indol-3-yl)ethylcarbamoyl, etc.

(5) The carboxyl group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, (i) a C₁₋₁₅ alkyloxycarbonyl (the C₁₋₁₅ alkyl herein has the same significance as for the “C₁₋₁₅ alkyl group” in the “C₁₋₁₅ alkyl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., tert-butyloxycarbonyl, benzyloxycarbonyl, 9-fluorenylmethoxycarbonyl), (ii) a C₆₋₁₄ aryloxycarbonyl (the C₆₋₁₄ aryl herein has the same significance as for the “C₆₋₁₄ aryl group” in the “C₆₋₁₄ aryl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., phenoxycarbonyl), etc.

(6) The sulfino group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, (i) a C₁₋₁₅ alkylsulfonyl (the C₁₋₁₅ alkyl herein has the same significance as for the “C₁₋₁₅ alkyl group” in the “C₁₋₁₅ alkyl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., benzylsulfonyl), (ii) a C₆₋₁₄ arylsulfonyl (the C₆₋₁₄ aryl herein has the same significance as for the “C₆₋₁₄ aryl group” in the “C₆₋₁₄ aryl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., tosyl), etc.

(7) The amidino group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, (i) amidino, (ii) a C₁₋₁₅ alkylamidino (the C₁₋₁₅ alkyl herein has the same significance as for the “C₁₋₁₅ alkyl group” in the “C₁₋₁₅ alkyl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., N-methylamidino), (iii) a C₁₋₁₅ acylamidino (the C₁₋₁₅ acyl herein has the same significance as for the “C₁₋₁₅ acyl group” in the “C₁₋₁₅ acyl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., N-acetylamidino), etc.

(8) The glyoxyloyl group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, (i) a C₁₋₁₅ alkyloxalyl (the C₁₋₁₅ alkyl herein has the same significance as for the “C₁₋₁₅ alkyl group” in the “C₁₋₁₅ alkyl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., ethyloxalyl), (ii) a C₆₋₁₄ aryloxalyl (the C₆₋₁₄ aryl herein has the same significance as for the “C₆₋₁₄ aryl group” in the “C₆₋₁₄ aryl group, which may optionally be substituted with a substituent containing a cyclic group,” e.g., phenyloxalyl), etc.

(9) The amino group used, which may optionally be substituted with a substituent containing a cyclic group, includes, for example, (i) a C₁₋₁₅ alkylamino (the C₁₋₁₅ alkyl herein has the same significance as for the “C₁₋₁₅ alkyl group” in the “C₁₋₁₅ alkyl group, which may optionally be substituted with a substituent containing a cyclic group.”

Among those described above, J¹ is preferably hydrogen atom, formyl, acetyl, 3-indolecarbonyl, 3-(indol-3-yl)propionyl, 3-phenylpropionyl, diphenylacetyl, 3-(pyridin-3-yl)propionyl, 4-imidazoleacetyl, cyclohexanecarbonyl, 1-piperidineacetyl, 1-methyl-1-piperidinioacetyl, 4-piperidinecarbonyl, hexanoyl, amino-(4-hydroxyphenyl)acetyl, D-glucuronyl, 2-(indol-3-yl)ethylcarbamoyl, tert-butyloxycarbonyl, 9-fluorenylmethoxycarbonyl, amidino, 4-guanidomethylbenzoyl, benzoyl, 3-indoleacetyl, benzyloxycarbonyl, tosyl, phenyl, benzyl, phenethyl, 3-pyridinecarbonyl, 2-pyridinecarbonyl, 4-pyridinecarbonyl, propionyl, isobutyryl, phenylacetyl, 2-methylnicotinoyl, 5-methylnicotinoyl, 6-methylnicotinoyl, pyrazinecarbonyl, cyclopropanecarbonyl, trifluoroacetyl, (R)-3-hydroxy-2-methylpropionyl, 2-hydroxyisobutyryl, 3-furancarbonyl, pyrrole-2-carbonyl, 4-imidazolecarbonyl, 6-hydroxynicotinoyl, 6-chloronicotinoyl, 6-(trifluoromethyl)nicotinoyl, dimethylcarbamoyl, 1-azetidinecarbonyl, 2-azetidinecarbonyl, 4-aminobenzoyl, 4-aminomethylbenzoyl, pyrrole-3-carbonyl, pyrimidine-4-carbonyl, pyrimidine-2-carbonyl, pyridazine-4-carbonyl, 6-aminocaproyl, glycyl, glycylglycyl, glycylglycylglycyl, alanylalanylalanyl, alanylalanylalanylalanyl, acetylglycyl, acetylglycylglycyl, acetylglycylglycylglycyl, acetylalanylalanylalanyl, acetylalanylalanylalanylalanyl, D-arginylglycyl, D-arginylglycylglycyl, D-arginylglycylglycylglycyl, D-arginylalanylalanylalanyl, D-arginylalanylalanylalanylalanyl, acetyl-D-arginylglycyl, acetyl-D-arginylglycylglycyl, acetyl-D-arginylglycylglycylglycyl, acetyl-D-arginylalanylalanylalanyl, acetyl-D-arginylalanylalanylalanylalanyl, cyclopropanecarbonyl, cyclopentanecarbonyl, cyclobutanecarbonyl, cyclohexanecarbonyl, 1-naphthoyl, 2-naphthoyl, arginyl, arginylarginyl, 6-(arginylamino)caproyl, 6-(D-arginylamino)caproyl, 6-(D-arginyl-D-arginylamino)caproyl, 6-(acetyl-D-arginylamino)caproyl, 6-((R)-2,3-diaminopropionylamino)caproyl, 6-(D-norleucylamino)caproyl, 3-(D-arginylamino)propionyl, 4-(D-arginylamino)butyryl, 4-(D-arginyl-D-arginylamino)butyryl, 4-(D-arginyl-D-arginyl-D-arginylamino)butyryl, 3-(4-hydroxyphenyl)propionyl, butyryl, methyl, adipoyl, pyroglutamyl, glycoloyl, etc., and more preferably used are hydrogen atom, formyl, acetyl, propionyl, 3-indolecarbonyl, 3-(indol-3-yl)propionyl, 3-phenylpropionyl, 3-(pyridin-3-yl)propionyl, 4-imidazoleacetyl, cyclohexanecarbonyl, hexanoyl, amino-(4-hydroxyphenyl)acetyl, 2-(indol-3-yl)ethylcarbamoyl, 9-fluorenylmethoxycarbonyl, amidino, 4-guanidomethylbenzoyl, benzoyl, 3-indoleacetyl, benzyl, phenethyl, 3-pyridinecarbonyl, 2-pyridinecarbonyl, 4-pyridinecarbonyl, isobutyryl, phenylacetyl, 6-methylnicotinoyl, pyrazinecarbonyl, cyclopropanecarbonyl, trifluoroacetyl, (R)-3-hydroxy-2-methylpropionyl, 2-hydroxyisobutyryl, 3-furancarbonyl, pyrrole-2-carbonyl, 4-imidazolecarbonyl, 6-hydroxynicotinoyl, 6-chloronicotinoyl, 6-(trifluoromethyl)nicotinoyl, dimethylcarbamoyl, 1-azetidinecarbonyl, 4-aminobenzoyl, 4-aminomethylbenzoyl, pyrrole-3-carbonyl, pyrimidine-4-carbonyl, pyrimidine-2-carbonyl, pyridazine-4-carbonyl, 6-aminocaproyl, cyclopropanecarbonyl, 2-naphthoyl, arginyl, 6-(arginylamino)caproyl, 6-(D-arginylamino)caproyl, 6-(D-arginyl-D-arginylamino)caproyl, 6-(acetyl-D-arginylamino)caproyl, 6-((R)-2,3-diaminopropionylamino)caproyl, 6-(D-norleucylamino)caproyl, 3-(D-arginylamino)propionyl, 4-(D-arginylamino)butyryl, 4-(D-arginyl-D-arginylamino)butyryl, 4-(D-arginyl-D-arginyl-D-arginylamino)butyryl, 3-(4-hydroxyphenyl)propionyl, butyryl, adipoyl, pyroglutamyl, etc.

J² represents (1) NH optionally substituted with a C₁₋₆ alkyl group, (2) CH₂ optionally substituted with a C₁₋₆ alkyl group, (3) O or (4) S.

The “C₁₋₆ alkyl group” used includes methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, etc.

Preferably, J² is NH.

J³ through J¹² each represents hydrogen atom or a C₁₋₃ alkyl group.

The “C₁₋₃ alkyl group” used includes methyl, ethyl, propyl, isopropyl, etc.

Preferably, J³ is hydrogen atom.

Preferably, J⁴ is hydrogen atom.

Preferably, J⁵ is hydrogen atom.

Preferably, J⁶ is hydrogen atom.

Preferably, J⁷ is hydrogen atom.

Preferably, J⁸ is hydrogen atom.

Preferably, J⁹ is hydrogen atom.

Preferably, J¹⁰ is hydrogen atom.

Preferably, J¹¹ is hydrogen atom.

Preferably, J¹² is hydrogen atom.

Q³ through Q¹² each represents a C₁₋₄ alkyl group, which may optionally have a substituent selected from the group consisting of:

(1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group; (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group; (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7; (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; (7) an optionally substituted amino group; (8) an optionally substituted guanidino group; (9) an optionally substituted hydroxyl group; (10) an optionally substituted carboxyl group; (11) an optionally substituted carbamoyl group; and, (12) an optionally substituted sulfhydryl group; or hydrogen atom.

Preferably, Q³ through Q⁹ include a C₁₋₄ alkyl group having a substituent selected from the group consisting of:

(1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group; (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group; (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms; (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7; (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; (7) an optionally substituted amino group; (8) an optionally substituted guanidino group; (9) an optionally substituted hydroxyl group; (10) an optionally substituted carboxyl group; (11) an optionally substituted carbamoyl group; and, (12) an optionally substituted sulfhydryl group; or hydrogen atom.

The “optionally substituted C₆₋₁₂ aromatic hydrocarbon group,” “optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms,” “optionally substituted C₈₋₁₄ aromatic fused cyclic group,” “optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms,” “optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7” and “optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7” used are the same as those given above.

(1) As the C₁₋₄ alkyl group having an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, there are used, for example, benzyl, 4-hydroxybenzyl, 2-chlorobenzyl, 3-chlorobenzyl, 4-chlorobenzyl, 4-aminobenzyl, etc.

(2) As the C₁₋₄ alkyl group having an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, there are used, for example, 2-pyridylmethyl, 3-pyridylmethyl, 4-pyridylmethyl, 4-imidazolemethyl, etc.

(3) As the C₁₋₄ alkyl group having an optionally substituted C₈₋₁₄ aromatic fused cyclic group, there are used, for example, 1-naphthylmethyl, 2-naphthylmethyl, etc.

(4) As the C₁₋₄ alkyl group having an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, there are used, for example, 3-indolemethyl, 1-formylindol-3-ylmethyl, 2-quinolylmethyl, etc.

(5) As the C₁₋₄ alkyl group having an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, there are used, for example, cyclohexylmethyl, etc.

(6) As the C₁₋₄ alkyl group having an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7, there are used, for example, piperidin-1-ylmethyl, etc.

(7) As the C₁₋₄ alkyl group having an optionally substituted amino group, there are used, for example, 2-aminoethyl, 3-aminopropyl, 4-aminobutyl, 4-acetamidobutyl, etc.

(8) As the C₁₋₄ alkyl group having an optionally substituted guanidino group, there are used, for example, 3-guanidinopropyl, 3-(N-tosyl)guanidinopropyl, etc.

(9) As the C₁₋₄ alkyl group having an optionally substituted hydroxyl group, there are used, for example, hydroxymethyl, 1-hydroxyethyl, benzyloxymethyl, etc.

(10) As the C₁₋₄ alkyl group having an optionally substituted carboxyl group, there are used, for example, carboxylmethyl, 2-carboxylethyl, benzyloxycarbonylmethyl, etc.

(11) As the C₁₋₄ alkyl group having an optionally substituted carbamoyl group, there are used, for example, carbamoylmethyl, 2-carbamoylethyl, xanthylcarbamoyl, etc.

(12) As the C₁₋₄ alkyl group having an optionally substituted sulfhydryl group, there are used, for example, sulfhydrylmethyl, 2-(methylsulfhydryl)ethyl, etc.

(13) As the unsubstituted C₁₋₄ alkyl group, there are used, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, etc.

Preferably, Q³ is hydrogen atom, 4-hydroxybenzyl, 3-pyridylmethyl, 4-pyridylmethyl, methyl, isobutyl, hydroxymethyl, carboxymethyl, 4-aminobutyl, etc., and more preferably, 4-hydroxybenzyl, 3-pyridylmethyl, 4-pyridylmethyl, etc.

Preferably, Q⁴ includes carbamoylmethyl, 2-carbamoylethyl, 4-hydroxybenzyl, 4-imidazolemethyl, isobutyl, hydroxymethyl, 1-hydroxyethyl, carboxymethyl, 4-aminobutyl, etc., and more preferably, carbamoylmethyl, 2-carbamoylethyl, 4-hydroxybenzyl, etc.

Preferably, Q⁵ includes benzyl, 2-chlorobenzyl, 3-chlorobenzyl, 4-chlorobenzyl, 4-aminobenzyl, 2-pyridylmethyl, 3-pyridylmethyl, 4-pyridylmethyl, 1-naphthylmethyl, 2-naphthylmethyl, 3-indolemethyl, 1-formylindol-3-ylmethyl, 2-quinolylmethyl, cyclohexylmethyl, hydroxymethyl, 1-hydroxyethyl, methyl, isopropyl, isobutyl, sec-butyl, carboxymethyl, 4-aminobutyl, etc., more preferably, benzyl, 2-chlorobenzyl, 3-chlorobenzyl, 4-chlorobenzyl, 4-aminobenzyl, 2-pyridylmethyl, 3-pyridylmethyl, 4-pyridylmethyl, 1-naphthylmethyl, 2-naphthylmethyl, 3-indolemethyl, 2-quinolylmethyl, cyclohexylmethyl, 1-hydroxyethyl, isopropyl, isobutyl, sec-butyl, etc.

Preferably, Q⁶ is methyl, hydroxymethyl, 1-hydroxyethyl, carbamoylmethyl, 2-carbamoylethyl, etc., more preferably, carbamoylmethyl, etc.

Preferably, Q⁷ is 4-hydroxybenzyl, carbamoylmethyl, 3-pyridylmethyl, methyl, isobutyl, benzyl, 4-aminobutyl, 3-indolemethyl, etc., more preferably, 4-hydroxybenzyl, etc.

Preferably, Q⁸ is benzyl, 2-pyridylmethyl, 3-pyridylmethyl, 4-pyridylmethyl, 2-naphthylmethyl, 3-indolemethyl, hydroxymethyl, cyclohexylmethyl, sec-butyl, 1-hydroxyethyl, methyl, methyl, isobutyl, 4-aminobutyl, 3-carboxypropyl, etc., more preferably, 4-pyridylmethyl, 3-indolemethyl, sec-butyl, etc.

Preferably, Q⁹ is hydrogen atom, methyl, ethyl, hydroxymethyl, 1-hydroxyethyl, carbamoylmethyl, 2-carbamoylethyl, ureidomethyl, acetamidomethyl, formamidemethyl, methylcarbamoylmethyl, dimethylcarbamoylmethyl, etc., more preferably, carbamoylmethyl, ureidomethyl, etc.

Preferably, Q¹⁰ is 4-hydroxybenzyl, 3-indolemethyl, methyl, 1-hydroxyethyl, 3-guanidinopropyl, etc., more preferably, 3-indolemethyl, etc.

Preferably, Q¹¹ is carbamoylmethyl, etc.

Preferably, Q¹² is methyl, carbamoylmethyl, etc., more preferably, carbamoylmethyl, etc.

Y¹ through Y³ each represents a group represented by formula: —CON(J¹³)-, —CSN(J¹³)-, —C(J¹⁴)N(J¹³)- or —N(J¹³)CO— (J¹³ and J¹⁴ each represents hydrogen atom or a C₁₋₃ alkyl group).

As the C₁₋₃ alkyl group represented by J¹³ and J¹⁴, there is used methyl, ethyl, propyl or isopropyl.

J¹³ is hydrogen atom.

J¹⁴ is hydrogen atom.

Y¹ is preferably a group represented by formula: —CONH— or —CH₂NH—, etc.

Y² is preferably a group represented by formula: —CONH— or —CH₂NH—, etc.

Y³ is preferably a group represented by formula: —CONH—, etc.

J³ and Q³, J⁴ and Q⁴, J⁵ and Q⁵, J⁶ and Q⁶, J⁷ and Q⁷, J⁸ and Q⁸, J⁹ and Q⁹, J¹⁰ and Q¹⁰, J¹¹ and Q¹¹, and J¹² and Q¹² may be combined together to form a ring. In this case, for example, cyclopentane, cyclohexane, piperidine, etc. are formed by C(J³)(Q³), C(J⁴)(Q⁴), C(J⁵)(Q⁵), C(J⁶)(Q⁶), C(J⁷)(Q⁷), C(J⁸)(Q⁸), C(J⁹)(Q⁹), C(J¹⁰)(Q¹⁰), C(J¹¹)(Q¹¹) or C(J¹²)(Q¹²).

Z¹ and R¹, J² and Q³, Y¹ and Q⁴, Y² and Q⁵, Y³ and Q⁶, J² and Q⁷, Y² and Q⁸, Y³ and Q⁹, J² and Q¹⁰, Y³ and Q¹¹, and J² and Q¹² (preferably, J² and Q³, Y¹ and Q⁴, Y² and Q⁵, Y³ and Q⁶, J² and Q⁷, Y² and Q⁸, Y³ and Q⁹, J² and Q¹⁰, Y³ and Q¹¹, and J² and Q¹²) may be combined together to form a ring. Alternatively, the ring formed may be optionally substituted, or annealed.

In the case where Z¹ and R¹, J² and Q³, J² and Q⁷, J² and Q¹⁰, or J² and Q¹² May be combined together to form a ring, for example, azetidine, pyrrolidine, piperidine or thiazolidine is formed by Z¹-N—CH—R¹, J²-C(J³)(Q³), J²-C(J⁷)(Q⁷), J²-C(J¹¹)(Q¹¹) or

J²-C(J¹²)(Q¹²). Alternatively, the ring formed may be optionally substituted, or annealed. Z¹-N—CH—R¹ is preferably azetidine, pyrrolidine, 4-hydroxypyrrolidine, piperidine, etc.

In the case where Y¹ and Q⁴, Y² and Q⁵, Y³ and Q⁶, Y² and Q⁸, Y³ and Q⁹, or Y³ and Q¹¹ may be combined together to form a ring, for example, pyrrolidine-2-carbonyl, piperidin-2-carbonyl or thiazolidine-4-carbonyl is formed by Y¹C(J⁴)(Q⁴), Y²C(J⁵)(Q⁵), Y³C(J⁶)(Q⁶), Y²C(J⁸)(Q⁸), Y³C(J⁹)(Q⁹), or Y³C(J¹¹)(Q¹¹) Alternatively, the ring formed may be optionally substituted, or annealed.

Preferred examples of the group represented by formula: J¹ J²-C(J³)(Q³)Y¹C(J⁴)(Q⁴)Y²C(J⁵)(Q⁵)Y³C(J⁶)(Q⁶)C(=Z¹⁰)- include:

Tyr Asn Trp Asn-, Tyr Asn Trp D-Asn-, Tyr Asn D-Trp Asn-, Tyr D-Asn Trp Asn-, D-Tyr Asn Trp Asn-, Tyr Lys Trp Asn-, Tyr Asp Trp Asn-, Tyr Tyr Trp Asn-, Tyr Leu Trp Asn-, Tyr Asn Ala Asn-, Tyr Asn Leu Asn-, Tyr Asn Ser Asn-, Tyr Asn Asp Asn-, Tyr Asn Lys Asn-, Ala Asn Trp Asn-, Leu Asn Trp Asn-, Ser Asn Trp Asn-, Asp Asn Trp Asn-, Lys Asn Trp Asn-, Tyr Asn Trp(For)Asn-, D-Tyr Asn D-Trp Asn-, D-Tyr Asn Ala Asn-, D-Tyr Asn Ser Asn-, D-Tyr Asn Cha Asn-, D-Tyr Asn Thr Asn-, D-Tyr Asn Ile Asn-, D-Tyr Gln Trp Asn-, D-Tyr Thr Trp Asn-, D-Tyr Asn Val Asn-, D-Tyr D-Asn Trp Asn-, D-Tyr D-Asn D-Trp Asn-, D-Tyr Asn Phe Asn-, D-Tyr Asn Nal(1) Asn-, D-Tyr Asn Nal(2) Asn-, D-Tyr Asn Phe(2Cl) Asn-, D-Tyr Asn Phe(3Cl) Asn-, D-Tyr Asn Phe(4Cl) Asn-, D-Tyr Asn Phe(4NH₂) Asn-, D-Tyr Asn Pya(3) Asn-, D-Tyr D-Asn Phe Asn-, D-Tyr D-Asn Cha Asn-, D-Tyr D-Asn Thr Asn-, D-Tyr Asn Pya(2) Asn-, D-Tyr Asn Pya(4) Asn-, D-Tyr D-Ser Trp Asn-, D-Tyr D-His Trp Asn-, D-Pya(3) D-Asn Cha Asn-, D-Pya(3) D-Tyr Cha Asn-, TyrΨ(CH₂NH)Asn Trp Asn-, D-Tyr AsnΨ(CH₂NH)Trp Asn-, TyrΨ(CH₂NH)Asn D-Trp Asn-, D-Tyr Asn Ala(2-Qui) Asn-, D-Tyr Asn D-Pya(4) Asn-, D-Tyr D-Asn Pya(4) Asn-, Tyr D-Asn Cha Asn-, Dap D-Tyr Asn Trp Asn- Arg D-Tyr D-Pya(4) Asn- Arg Arg D-Tyr D-Pya(4) Asn- Arg Acp D-Tyr D-Pya(4) Asn- D-Arg Acp D-Tyr D-Trp Asn- D-Arg D-Arg Acp D-Tyr D-Trp Asn- Ac D-Arg Acp D-Tyr D-Trp Asn- D-Dap Acp D-Tyr D-Trp Asn- D-Nle Acp D-Tyr D-Trp Asn- D-Arg β-Ala D-Tyr D-Trp Asn- D-Arg γ-Abu D-Tyr D-Trp Asn- D-Arg D-Arg γ-Abu D-Tyr D-Trp Asn- D-Arg D-Arg D-Arg γ-Abu D-Tyr D-Trp Asn- Gly D-Tyr D-Trp Asn- Ac Gly D-Tyr D-Trp Asn- D-Tyr D-Tyr D-Trp Asn- Ac D-Tyr D-Tyr D-Trp Asn-

pGlu D-Tyr D-Trp Asn-

Tyr D-Tyr D-Trp Asn-

Ac Tyr D-Tyr D-Trp Asn-, and the like.

Preferred examples of the group represented by formula: J¹-J²-C(J⁷)(Q⁷)Y²C(J⁸)(Q⁸)Y³C(J⁹)(Q⁹)C(=Z¹⁰)- include:

Fmoc Asn Trp Asn-, D-Asn Trp Asn-, D-Tyr Trp Asn-, D-Tyr D-Trp Asn-, D-Tyr Ser Asn-, D-Tyr Thr Asn-, D-Tyr Ile Asn-, D-Tyr Phe Asn-, D-Tyr Nal(2) Asn-, D-Pya(3) Phe Asn-, D-Pya(3) Trp Asn-, D-Tyr D-Pya(4) Asn-, D-Asn Cha Asn- D-Tyr D-Pya(4) Ala- D-Tyr D-Pya(4) Thr- D-Tyr Pya(4) Ala- D-Tyr D-Trp Ala- D-Tyr D-Trp Abu- D-Tyr D-Phe Ala-6-Aminocaproyl- D-Tyr D-Pya(4) Asn- Ac D-Tyr D-Pya(4) Asn- Benzoyl D-Tyr D-Trp Asn- Cyclopropanecarbonyl D-Tyr D-Trp Asn- Butyryl D-Tyr D-Trp Asn- Me D-Tyr D-Trp Asn- Ac D-Tyr D-Trp Gln- Ac D-Tyr D-Trp Ser- Ac D-Tyr D-Trp Thr- Ac D-Tyr D-Trp Alb- Ac D-Tyr D-Trp Dap(Ac)- Ac D-Tyr D-Trp Dap(For)- Ac D-Tyr Trp Asn- Ac D-NMeTyr D-Trp Asn- For D-Tyr D-Trp Asn- Propionyl D-Tyr D-Trp Asn- Amidino D-Tyr D-Trp Asn- Ac D-Ala D-Trp Asn- Ac D-Leu D-Trp Asn- Ac D-Phe D-Trp Asn- Ac D-Nal(1) D-Trp Asn- Ac D-Nal(2) D-Trp Asn- Ac D-Lys D-Trp Asn- Ac D-Glu D-Trp Asn- Ac D-Tyr D-Ala Asn- Ac D-Tyr D-Leu Asn- Ac D-Tyr D-Phe Asn- Ac D-Tyr D-Thr Asn- Ac D-Tyr D-Lys Asn- Ac D-Tyr D-Glu Asn- Ac D-Tyr D-Trp Asp- Ac D-Tyr D-Trp D-Asn- Ac D-Tyr D-Trp NMeAsn- Ac D-Tyr Pro Asn- Ac D-Tyr D-Pya(2) Asn- Ac D-Tyr D-Pya(3) Asn- Ac D-Tyr D-Pro Asn- Ac D-Tyr Tic Asn- Ac Tyr Trp Asn- Ac D-Tyr NMeTrp Asn- Glycoloyl D-Tyr D-Trp Asn- Ac D-Tyr D-Trp Gly- Ac D-Tyr D-Trp Dap- Ac D-Tyr D-Trp Asp(NHMe)-

Ac D-Tyr D-Trp Asp(NMe2)-, and the like.

Preferred examples of the group represented by formula: J¹-J²-C(J¹⁰)(Q¹⁰)Y³C(J¹¹)(Q¹¹)C(=Z¹⁰)- include:

Fmoc Trp Asn-, Boc Tyr Asn-, Tyr Asn-, D-Trp Asn-, Ac Trp Asn-, Amidino Trp Asn-, Ac Ala Asn-, Ac Arg Asn-, Ac Thr Asn- D-Tyr D-Pya(4)- 3-(4-Hydroxyphenyl)propionyl D-Trp Asn- D-Trp Asn- Ac D-Trp Asn- Hexanoyl D-Trp Asn- Cyclohexanecarbonyl D-Trp Asn- Benzoyl D-Trp Asn- 3-Pyridinepropionyl D-Trp Asn- Adipoyl D-Trp Asn- 6-Aminocaproyl D-Trp Asn- Amidino D-Trp Asn-

Glycoloyl D-Trp Asn-, and the like.

Preferred examples of the group represented by formula: J¹-J²-C(J¹²)(Q¹²)C(=Z¹⁰)- include:

Fmoc Asn-,

3-(Indol-3-yl)propionyl Asn-,

3-Indolecarbonyl Asn-, 3-Indoleacetyl Asn-,

4-(Indol-3-yl)butyryl Asn-,

Diphenylacetyl Asn-, Hexanoyl Asn-, Cyclohexanecabonyl Asn-,

2-(Indol-3-yl)ethylcabamoyl Asn-,

3-(3-Pyridyl)propionyl Asn-, 4-Imidzoleacetyl Asn-, Piperidinecarbonyl Asn-, 1-Piperidineacetyl Asn-,

1-Methyl-1-piperidinioacetyl Asn-,

1-Pyridinioacetyl Asn-, D-Glucuronyl Asn-, 3-Phenylpropionyl Asn-, 3-Phenylpropionyl Ala-, Benzoyl Asn-, Ac Asn-, Cyclopropanecarbonyl Asn-,

2-Naphthoyl Asn-, and the like.

Preferred examples of the group represented by formula: J¹- include:

hydrogen atom,

GuAmb-, 3-(3-Indolyl)propionyl-, 3-(3-Pyridyl)propionyl-, Benzoyl-,

Indole-3-carbonyl-, Indole-3-acetyl-,

Ac-, Hexanoyl-, Tos-, 3-Phenylpropionyl-,

2-(Indol-3-yl)ethylcarbamoyl-,

Benzyl-, Phenethyl-, 2-Pyridinecarbonyl-, 4-Pyridinecarbonyl-, Propionyl-, Isobutyryl-, Cyclohexanecarbonyl-, Phenylacetyl-, 2-Methylnicotinoyl-, 5-Methylnicotinoyl-, 6-Methylnicotinoyl-, Pyrazinecarbonyl-, Cyclopropanecarbonyl-, Trifluoroacetyl-,

(R)-3-hydroxy-2-methylpropionyl-,

2-Hydroxyisobutyryl-, 3-Furancarbonyl-,

Pyrrole-2-carbonyl-,

4-Imidazolecarbonyl-, 6-Hydroxynicotinoyl-, 6-Chloronicotinoyl-, 6-(Trifluoromethyl)nicotinoyl-, Dimethylcarbamoyl-, 1-Azetidinecarbonyl-, 2-Azetidinecarbonyl-, 4-Aminobenzoyl-, 4-Aminomethylbenzoyl-,

Pyrrole-3-carbonyl-, Pyrimidine-4-carbonyl-, Pyrimidine-2-carbonyl-, Pyridazine-4-carbonyl-, and the like.

The metastin derivatives (I) in the metastin derivatives (III) of the present invention, wherein V′ represents the group represented by formula:

(wherein each symbol has the same significance as defined above) are a class of compound disclosed in the specification filed as PCT/JP03/16978, whereas the metastin derivatives (II), wherein V′ represents the group represented by formula:

(wherein each symbol has the same significance as defined above), or the group represented by formula:

(wherein each symbol has the same significance as defined above) are novel compounds.

In the metastin derivatives (III), all compounds that the groups shown by the respective symbols are optionally combined are preferably used. Among them, the compounds shown by Compound Numbers below (TABLES 1 through 11) are preferred.

MS10: Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂  1    2   3   4     5   6   7   8   9   10 Compound No. 17: [Pya(4)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Pya(4)-NH₂ Compound No. 18: [Tyr(Me)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Tyr(Me)-NH₂ Compound No. 19: [Phe(2F)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(2F)-NH₂ Compound No. 23: [Tyr5]MS10 Tyr-Asn-Trp-Asn-Tyr-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 24: [Leu5]MS10 Tyr-Asn-Trp-Asn-Leu-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 30: Acetyl-MS10 Acetyl-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 31: Fmoc-MS10 Fmoc-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 38: [D-Ser5]MS10 Tyr-Asn-Trp-Asn-D-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 39: [D-Asn4]MS10 Tyr-Asn-Trp-D-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 40: [D-Trp3]MS10 Tyr-Asn-D-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 41: [D-Asn2]MS10 Tyr-D-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 42: [D-Tyr1]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 44: [Lys9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Lys-Phe-NH₂ Compound No. 45: [Ala8]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Ala-Arg-Phe-NH₂ Compound No. 50: [Ala7]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Ala-Leu-Arg-Phe-NH₂ Compound No. 51: [NMePhe10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-NMePhe-NH₂ Compound No. 53: des(1-3)-Fmoc-MS10 Fmoc-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 54: des(1-2)-Fmoc-MS10 Fmoc-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 55: des(1)-Fmoc-MS10 Fmoc-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 56: [Lys2]MS10 Tyr-Lys-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 57: [Asp2]MS10 Tyr-Asp-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 58: [Tyr2]MS10 Tyr-Tyr-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 59: [Leu2]MS10 Tyr-Leu-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 60: [Pya(3)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Pya(3)-NH₂ Compound No. 61: [Phe(4F)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(4F)-NH₂ Compound No. 67: [Ala3]MS10 Tyr-Asn-Ala-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 68: [Leu3]MS10 Tyr-Asn-Leu-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 69: [Ser3]MS10 Tyr-Asn-Ser-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 70: [Asp3]MS10 Tyr-Asn-Asp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 71: [Lys3]MS10 Tyr-Asn-Lys-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 72: [Ala1]MS10 Ala-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 73: [Leu1]MS10 Leu-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 74: [Ser1]MS10 Ser-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 75: [Asp1]MS10 Asp-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 76: [Lys1]MS10 Lys-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 77: [Phe(4CN)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(4CN)-NH₂ Compound No. 78: [Trp(For)3, Phe(4CN)10]MS10 Tyr-Asn-Trp(For)-Asn-Ser-Phe-Gly-Leu-Arg-Phe(4CN)-NH₂ Compound No. 79: [Hph10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Hph-NH₂ Compound No. 81: [NMeArg9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-NMeArg-Phe-NH₂ Compound No. 82: [Arg(Me)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 83: [Arg(asy Me₂)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(asyMe₂)-Phe-NH₂ Compound No. 87: des(4-5)-Boc-MS10 Boc-Tyr-Asn-Trp-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 88: des(4-5)-MS10 Tyr-Asn-Trp-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 90: [Lys9,9Ψ10,CH₂NH]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-LysΨ(CH₂NH)Phe-NH₂ Compound No. 91: [8ΨP9,CH₂NH]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-LeuΨ(CH₂NH)Arg-Phe-NH₂ Compound No. 97: [Har9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Har-Phe-NH₂ Compound No. 98: [Lys(Me₂)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Lys(Me₂)-Phe-NH₂ Compound No. 101: [Ser7]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Ser-Leu-Arg-Phe-NH₂ Compound No. 105: [Nle8]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Nle-Arg-Phe-NH₂ Compound No. 107: [Val8]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Val-Arg-Phe-NH₂ Compound No. 109: [Tyr10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Tyr-NH₂ Compound No. 110: [Nal(2)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Nal(2)-NH₂ Compound No. 111: [Phe(F5)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(F5)-NH₂ Compound No. 112: [Cha10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Cha-NH₂ Compound No. 114: des(1-3)-3-(3-Indolyl)propionyl-MS10 3-(3-Indolyl)propionyl-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 121: des(1-4)-[Trp5]MS10 Trp-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 123: [NMeLeu8]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-NMeLeu-Arg-Phe-NH₂ Compound No. 126: [NMeSer5]MS10 Tyr-Asn-Trp-Asn-NMeSer-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 127: [D-Asn4,NMePhe6]MS10 Tyr-Asn-Trp-D-Asn-Ser-NMePhe-Gly-Leu-Arg-Phe-NH₂ Compound No. 128: [10Ψ,CSNH]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-PheΨ(CSNH)NH₂ Compound No. 129: [Arg(symMe₂)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(symMe₂)-Phe-NH₂ Compound No. 130: [Phe(4Cl)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(4Cl)-NH₂ Compound No. 131: [Phe(4NH₂)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(4NH₂)-NH₂ Compound No. 132: [Phe(4NO₂)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(4NO₂)-NH₂ Compound No. 133: [Nal(1)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Nal(1)-NH₂ Compound No. 134: [Trp10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Trp-NH₂ Compound No. 137: [Nle9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Nle-Phe-NH₂ Compound No. 138: [Cit9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Cit-Phe-NH₂ Compound No. 140: [Arg(Me)9,NMePhe10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-NMePhe-NH₂ Compound No. 141: [D-Tyr1,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 142: [D-Tyr1,D-Trp3,Arg(Me)9]MS10 D-Tyr-Asn-D-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 143: [D-Trp3,Arg(Me)9]MS10 Tyr-Asn-D-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 144: des(1-3)-Fmoc-[Arg(Me)9]MS10 Fmoc-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 145: des(1-2)-Fmoc-[Arg(Me)9]MS10 Fmoc-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 146: [10Ψ,CSNH,D-Tyr1]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-PheΨ(CSNH)NH₂ Compound No. 150: [Tyr6]MS10 Tyr-Asn-Trp-Asn-Ser-Tyr-Gly-Leu-Arg-Phe-NH₂ Compound No. 151: [Nal(1)6]MS10 Tyr-Asn-Trp-Asn-Ser-Nal(1)-Gly-Leu-Arg-Phe-NH₂ Compound No. 152: [Nal(2)6]MS10 Tyr-Asn-Trp-Asn-Ser-Nal(2)-Gly-Leu-Arg-Phe-NH₂ Compound No. 153: [Phe(F5)6]MS10 Tyr-Asn-Trp-Asn-Ser-Phe(F₅)-Gly-Leu-Arg-Phe-NH₂ Compound No. 154: [Phe(4F)6]MS10 Tyr-Asn-Trp-Asn-Ser-Phe(4F)-Gly-Leu-Arg-Phe-NH₂ Compound No. 156: [Cha6]MS10 Tyr-Asn-Trp-Asn-Ser-Cha-Gly-Leu-Arg-Phe-NH₂ Compound No. 163: [6Ψ7,CH₂NH]MS10 Tyr-Asn-Trp-Asn-Ser-PheΨ(CH₂NH)Gly-Leu-Arg-Phe-NH₂ Compound No. 165: [Dap(Gly)9]-MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Dap(Gly)-Phe-NH₂ Compound No. 166: [6Ψ7,CSNH]MS10 Tyr-Asn-Trp-Asn-Ser-PheΨ(CSNH)Gly-Leu-Arg-Phe-NH₂ Compound No. 169: [D-Tyr1,Ala3,Arg(Me)9]MS10 D-Tyr-Asn-Ala-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 170: [D-Tyr1,Ser3,Arg(Me)9]MS10 D-Tyr-Asn-Ser-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 171: [D-Tyr1,Cha3,Arg(Me)9]MS10 D-Tyr-Asn-Cha-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 172: [D-Tyr1,Cha6,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 173: [D-Tyr1,Ala7,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Ala-Leu-Arg(Me)-Phe-NH₂ Compound No. 174: [D-Tyr1,Arg(Me)9,Trp10]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 176: [AzaGly7]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg-Phe-NH₂ Compound No. 181: [D-Tyr1,Cha3,6,Arg(Me)9]MS10 D-Tyr-Asn-Cha-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 182: [D-Tyr1,Cha3,6,Arg(Me)9,Trp10]MS10 D-Tyr-Asn-Cha-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 183: [Phe(4NH₂)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Phe(4NH₂)-Phe-NH₂ Compound No. 184: [Phe(4-Guanidino)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Phe(4-Guanidino)-Phe-NH₂ Compound No. 185: [Dap(GnGly)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Dap(GnGly)-Phe-NH₂ Compound No. 186: [Trp(For)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Trp(For)-NH₂ Compound No. 187: [Abu8]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Abu-Arg-Phe-NH₂ Compound No. 189: [Ala(3-Bzt)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Ala(3-Bzt)-NH₂ Compound No. 190: [D-Tyr1,Cha3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Cha-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 191: [D-Tyr1,Ser3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Ser-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 192: [D-Tyr1,Arg(Et)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Et)-Phe-NH₂ Compound No. 193: [D-Tyr1,Arg(n-Pr)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(n-Pr)-Phe-NH₂ Compound No. 194: [D-Tyr1,Arg(Ac)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Ac)-Phe-NH₂ Compound No. 197: [Phe(3F)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(3F)-NH₂ Compound No. 198: [Phe(3,4F₂)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(3,4F₂)-NH₂ Compound No. 199: [Phe(3,4Cl₂)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(3,4Cl₂)-NH₂ Compound No. 200: [Phe(3CF₃)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe(3CF₃)-NH₂ Compound No. 201: [Ala(2-Qui)10]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Ala(2-Qui)-NH₂ Compound No. 203: [D-Tyr1,Cha6,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 204: [D-Tyr1, Ala7, Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Ala-Leu-Arg(Me)-Phe-NH₂ Compound No. 205: [D-Tyr1,Thr3,Arg(Me)9]MS10 D-Tyr-Asn-Thr-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 206: [D-Tyr1,Ile3,Arg(Me)9]MS10 D-Tyr-Asn-Ile-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 207: [D-Tyr1,Ser4,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Ser-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 208: [D-Tyr1,Thr4,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Thr-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 209: [D-Tyr1,Gln4,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Gln-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 210: [D-Tyr1,Ala4,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Ala-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 211: [D-Tyr1,Thr5,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Thr-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 212: [D-Tyr1,Ala5,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ala-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 213: [D-Tyr1,Val8,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Val-Arg(Me)-Phe-NH₂ Compound No. 214: [D-Tyr1,Gln2,Arg(Me)9]MS10 D-Tyr-Gln-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 215: [D-Tyr1,Thr2,Arg(Me)9]MS10 D-Tyr-Thr-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 216: des(1)-[D-Asn2,Arg(Me)9]MS10 D-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 217: des(1)-[D-Tyr2,Arg(Me)9]MS10 D-Tyr-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 218: [N((CH₂)₃Gn)]Gly9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-N((CH₂)₃Gn)Gly-Phe-NH₂ Compound No. 220: [Arg(Et)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Et)-Phe-NH₂ Compound No. 221: [D-Tyr1,Thr3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Thr-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 222: des(1)-[D-Tyr2,AzaGly7,Arg(Me)9]MS10 D-Tyr-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 223: des(1-2)-[D-Trp3,Arg(Me)9]MS10 D-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 224: des(1)-[D-Tyr2,D-Trp3,Arg(Me)9]MS10 D-Tyr-D-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 225: des(1)-[D-Asn2,D-Trp3,Arg(Me)9]MS10 D-Asn-D-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 226: des(1)-[D-Tyr2,Ser3,Arg(Me)9]MS10 D-Tyr-Ser-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 227: des(1)-[D-Tyr2,Thr3,Arg(Me)9]MS10 D-Tyr-Thr-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 228: des(1)-[D-Tyr2,Ile3,Arg(Me)9]MS10 D-Tyr-Ile-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 229: [D-Tyr1,Val3,Arg(Me)9]MS10 D-Tyr-Asn-Val-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 230: [D-Tyr1,D-Asn2,Arg(Me)9]MS10 D-Tyr-D-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 231: [D-Tyr1,D-Asn2,D-Trp3,Arg(Me)9]MS10 D-Tyr-D-Asn-D-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 232: [D-Tyr1,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 233: [D-Tyr1,Ile3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Ile-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 234: [D-Tyr1,Val3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Val-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 235: [D-Tyr1,Ala3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Ala-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 236: [D-Tyr1,D-Trp3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 237: [D-Tyr1,D-Asn2,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 238: [D-Tyr1,D-Asn2,D-Trp3,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Asn-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 239: des(1)-[D-Tyr2,Ser3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Ser-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 240: des(1)-[D-Tyr2,Ile3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Ile-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 241: des(1)-[D-Tyr2,Thr3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Thr-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 242: des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 244: [D-Tyr1,Phe3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Phe-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 245: [D-Tyr1,Nal(1)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Nal(1)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 246: [D-Tyr1,Nal(2)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Nal(2)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 247: [D-Tyr1,Phe(2Cl)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Phe(2Cl)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 248: [D-Tyr1,Phe(3Cl)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Phe(3Cl)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 249: [D-Tyr1,Phe(4Cl)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Phe(4Cl)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 250: [D-Tyr1,Phe(4NH2)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Phe(4NH₂)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 251: [D-Tyr1,Pya(3)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Pya(3)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 252: [D-Tyr1,D-Ala3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-D-Ala-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 253: [D-Tyr1,Pro3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Pro-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 254: des(1)-[D-Tyr2,Phe3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Phe-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 255: des(1)-[D-Tyr2,Nal(2)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Nal(2)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 256: des(1)-[D-Pya(3)2,Phe3,AzaGly7,Arg(Me)9]MS10 D-Pya(3)-Phe-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 257: [D-Tyr1,D-Asn2,Phe3,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Asn-Phe-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 258: [D-Pya(3)1,AzaGly7,Arg(Me)9]MS10 D-Pya(3)-Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 259: [D-Ala1,AzaGly7,Arg(Me)9]MS10 D-Ala-Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 260: des(1-3)-3-(3-Indolyl)propionyl-[AzaGly7,Arg(Me)9]MS10 3-(3-Indolyl)propionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 261: [7Ψ8,CH₂NH]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-GlyΨ(CH₂NH)Leu-Arg-Phe-NH₂ Compound No. 265: des(1-3)-Indole-3-carbonyl-[AzaGly7,Arg(Me)9]MS10 Indole-3-carbonyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 266: des(1-3)-Indole-3-acetyl-[AzaGly7,Arg(Me)9]MS10 Indol-3-acetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 267: des(1-3)-4-(3-Indolyl)butyryl-[AzaGly7,Arg(Me)9]MS10 4-(3-Indolyl)butyryl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 268: des(1-3)-Diphenylacetyl-[AzaGly7,Arg(Me)9]MS10 Diphenylacetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 269: des(1-3)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9]MS10 3-Phenylpropionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 270: [D-Tyr1,Phe3,Ser-Phe5,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Phe-Asn-Ser-Phe-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 271: des(1-2)-[AzaGly7,Arg(Me)9]MS10 Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 272: des(1-2)-Acetyl-[AzaGly7,Arg(Me)9]MS10 Acetyl-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 273: des(1-2)-Amidino-[AzaGly7,Arg(Me)9]MS10 Amidino-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 274: des(1-2)-Acetyl-[Ala3,AzaGly7,Arg(Me)9]MS10 Acetyl-Ala-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 275: des(1-2)-Acetyl-[Arg3,AzaGly7,Arg(Me)9]MS10 Acetyl-Arg-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 276: des(1-2)-Acetyl-[Thr3,AzaGly7,Arg(Me)9]MS10 Acetyl-Thr-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 277: des(1-3)-n-Hexanoyl-[AzaGly7,Arg(Me)9]MS10 n-Hexanoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 278: des(1-3)-Cyclohexanecarbonyl-[AzaGly7, Arg(Me)9]MS10 Cyclohexanecarbonyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 279: des(1-3)-2-(Indol-3-yl)ethylcarbamoyl-[AzaGly7,Arg(Me)9]MS10 2-(indol-3-yl)ethylcarbamoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 281: [D-Tyr1,Pya(2)6,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Pya(2)-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 282: [D-Tyr1,Pya(4)6,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Pya(4)-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 283: [D-Tyr1,D-Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Asn-Cha-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 284: [D-Tyr1,D-Asn2,Thr3,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Asn-Thr-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 285: [D-Tyr1,Pya(2)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Pya(2)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 286: [D-Tyr1,Pya(4)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 287: [D-Tyr1,D-Ser2,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Ser-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 288: [D-Tyr1,D-His2,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-His-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 289: des(1)-[D-Pya(3)2,AzaGly7,Arg(Me)9]MS10 D-Pya(3)-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 290: [D-Pya(3)1,D-Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 D-Pya(3)-D-Asn-Cha-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 291: [D-Pya(3)1,D-Tyr2,Cha3,AzaGly7,Arg(Me)9]MS10 D-Pya(3)-D-Tyr-Cha-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 293: [4Ψ5,CH₂NH]MS10 Tyr-Asn-Trp-AsnΨ(CH₂NH)Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 294: [1Ψ2,CH₂NH]MS10 TyrΨ(CH₂NH)Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 295: [2Ψ3,CH₂NH]MS10 Tyr-AsnΨ(CH₂NH)Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 296: [6Ψ7,CSNH,D-Tyr1,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-PheΨ(CSNH)Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 297: [D-Tyr1,Thr5,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 298: [D-Tyr1,D-Asn2,Thr5,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Asn-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 299: [1Ψ2,CH₂NH,AzaGly7,Arg(Me)9]-MS10 TyrΨ(CH₂NH)Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 300: [1Ψ2,CH₂NH,D-Trp3,AzaGly7,Arg(Me)9]-MS10 TyrΨ(CH₂NH)Asn-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 301: [D-Tyr1,Ala(2-Qui)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-Ala(2-Qui)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 302: [D-Tyr1,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Asn-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 303: [D-Tyr1,D-Asn2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Asn-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 304: [D-Asn2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 Tyr-D-Asn-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 305: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 306: [D-Pya(4)1,D-Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 D-Pya(4)-D-Asn-Cha-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 307: [7Ψ8,CH₂NH,D-Tyr1,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-GlyΨ(CH₂NH)Leu-Arg(Me)-Phe-NH₂ Compound No. 308: [6Ψ7,CH₂NH,D-Tyr1,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-PheΨ(CH₂NH)Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 310: [Nar9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Nar-Phe-NH₂ Compound No. 311: [Nar(Me)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Nar(Me)-Phe-NH₂ Compound No. 312: [Har(Me)9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Har(Me)-Phe-NH₂ Compound No. 313: [Dab9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Dab-Phe-NH₂ Compound No. 314: [Orn9]MS10 Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Orn-Phe-NH₂ Compound No. 315: des(1)-[D-Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 D-Asn-Cha-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 316: [D-Tyr1,D-Asn2,Thr3,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 D-Tyr-D-Asn-Thr-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ Compound No. 317: [D-Tyr1,D-Asn2,Pya(4)3,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 D-Tyr-D-Asn-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ Compound No. 318: [D-Tyr1,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 D-Tyr-Asn-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ Compound No. 319: [6Ψ7,NHCO,D-Tyr1,Arg(Me)9]MS10 D-Tyr-Asn-Trp-Asn-Ser-PheΨ(NHCO)Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 322: des(1-3)-3-(3-Pyridyl)propionyl-[AzaGly7,Arg(Me)9]MS10 3-(3-Pyridyl)propionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 323: des(1-3)-4-Imidazoleacetyl-[AzaGly7,Arg(Me)9]MS10 4-Imidazoleacetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 324: des(1-3)-4-Piperidinecarbonyl-[AzaGly7,Arg(Me)9]MS10 Piperidinecarbonyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 325: des(1-3)-1-Piperidineacetyl-[AzaGly7,Arg(Me)9]MS10 1-Piperidineacetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 326: des(1-3)-1-Methylpiperidinio-1-acetyl-[AzaGly7,Arg(Me)9]MS10 1-Methylpiperidino-1-acetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 327: des(1-3)-1-Pyridinioacetyl-[AzaGly7,Arg(Me)9]MS10 1-Pyridinoacetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 328: des(1-3)-D-Glucuronyl-[AzaGly7,Arg(Me)9]MS10 D-Glucuronyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 375: 2-Aminoethyl-Gly-[D-Tyr1,Arg(Me)9]MS10 2-Aminoethyl-Gly-D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 385: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 386: des(1-3)-3-(3-Pyridyl)propionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 3-(3-Pyridyl)propionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 387: Dap-[D-Tyr1,Arg(Me)9]MS10 Dap-D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 397: Methylthiocarbamoyl-Sar-[D-Tyr1,Arg(Me)9]MS10 Methylthiocarbamoyl-Sar-D-Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 400: (S)-1-(Quinolin-8-yl-carbamoyl)-4-thiapentylcarbamoyl-[D-Tyr1,Arg(Me)9]MS10 (S)-1-(Quinolin-8-yl-carbamoyl)-4-thiapentylcarbamoyl-D-Tyr-Asn-Trp-Asn-Ser-Phe- Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 481: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har-Trp-NH₂ Compound No. 486: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Orn9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Orn-Phe-NH₂ Compound No. 487: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Lys9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Lys-Phe-NH₂ Compound No. 488: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har-Phe-NH₂ Compound No. 489: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har(Me)9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har(Me)-Phe-NH₂ Compound No. 490: des(1)-[D-Tyr2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 491: des(1)-[D-Tyr2,D-Pya(4)3,Trp5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Trp-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 492: des(1)-[D-Tyr2,D-Pya(4)3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 493: des(1)-[D-Tyr2,D-Pya(4)3,Thr4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Thr-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 494: des(1,4)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 495: des(1-3)-[D-Tyr4,Pya(4)5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-Pya(4)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 496: des(1)-[D-Tyr2,D-Pya(4)3,Cha6,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 497: des(1)-[D-Tyr2,D-Pya(4)3,Cha6,Ala7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Cha-Ala-Leu-Arg(Me)-Trp-NH₂ Compound No. 498: des(1)-[D-Tyr2,D-Pya(4)3,Ile5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ile-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 499: des(1-3)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 500: des(1-3)-3-Phenylpropionyl-[Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 501: des(1)-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 502: des(1)-[D-Tyr2,Pya(4)3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-Pya(4)-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 503: des(1)-[D-Tyr2,D-Trp3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 504: [Acp1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 Acp-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 505: des(1-3)-3-Phenylpropionyl-[Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 506: des(1-3)-3-Phenylpropionyl-[Ile5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ile-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 507: des(1-3)-3-Phenylpropionyl-[Trp6,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Trp-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 508: des(1-3)-3-Phenylpropionyl-[Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 509: des(1-3)-Benzoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 510: des(1-3)-Ac-[AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 511: des(1)-[D-Tyr2,D-Trp3,Ala4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Ala-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 512: des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 513: des(1)-[D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Abu-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 514: des(1)-[D-Tyr2,D-Phe3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Phe-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 515: des(1)-[D-Tyr2,D-Pya(4)3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 516: des(1)-Ac-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 517: des(1-3)-3-Phenylpropionyl-[Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Hyp-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 518: des(1-3)-3-Phenylpropionyl-[Cha6,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 519: des(1-3)-Phenylacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Phenylacetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 521: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg-Phe-NH₂ Compound No. 522: des(1-3)-Benzoyl-[Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 523: des(1-3)-Benzoyl-[Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 524: des(1-3)-3-Phenylpropionyl-[Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Pro-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 527: des(1)-[D-Tyr2,D-Pya(4)3,Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Hyp-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 528: des(1)-[D-Tyr2,D-Pya(4)3,Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Pro-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 529: des(1)-[D-Tyr2,D-Pya(4)3,Tle5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Tle-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 530: des(1)-[D-Tyr2,D-Pya(4)3,Phg5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Phg-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 531: des(1-3)-3-Phenylpropionyl-[Pic(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Pic(2)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 532: des(1-3)-3-Phenylpropionyl-[Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Aze(2)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 533: des(1-3)-3-Phenylpropionyl-[D-Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-D-Pro-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 534: des(1-3)-Cyclopropanecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Cyclopropanecarbonyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 535: des(1-3)-2-Naphthoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 2-Naphthoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 536: [Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 Arg-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 537: Arg-[Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 Arg-Arg-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 538: Arg-[Acp1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 Arg-Acp-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 539: des(1)-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 540: des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 541: D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 542: D-Arg-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 545: des(1-3)-Benzoyl-[Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Ser-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 546: des(1-3)-3-Phenylpropionyl-[Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser(Ac)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 547: des(1)-[D-Tyr2,D-Pya(4)3,Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser(Ac)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 548: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,10Ψ,CSNH]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-PheΨ(CSNH)NH₂ Compound No. 550: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 551 Ac-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 552: D-Dap-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 553: D-Nle-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Nle-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 554: D-Arg-[β-Ala1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-β-Ala-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 555: D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 556: D-Arg-D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 557: D-Arg-D-Arg-D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-D-Arg-D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 558: des(1)-Ac-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 559: des(1-2)-3-(4-Hydroxyphenyl)propionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9, Trp10]MS10 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 561: D-Arg-[Acp1,D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-Acp-D-Tyr-D-Trp-Abu-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 562: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 563: des(1)-Ac-[D-Tyr2,D-Trp3,Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Aze(2)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 564: des(1)-Ac-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 565: des(1)-Benzoyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 566: des(1)-Cyclopropanecarbonyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9, Trp10]MS10 Cyclopropanecarbonyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 567: des(1)-Butyryl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Butyryl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 568: Ac-[D-Arg1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Arg-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 569: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,6Ψ7,CH₂NH,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-PheΨ(CH₂NH)Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 570: des(1)-Me-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Me-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 571: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 572: des(1)-[D-Trp2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Trp-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 573: des(1)-Ac-[D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Abu-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 576: des(1)-Ac-[D-Tyr2,D-Trp3,Gln4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Gln-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 577: des(1)-Ac-[D-Tyr2,D-Trp3,Ser4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Ser-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 578: des(1)-Ac-[D-Tyr2,D-Trp3,Thr4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Thr-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 579: des(1)-Ac-[D-Tyr2,D-Trp3,Alb4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 580: des(1)-Ac-[D-Tyr2,D-Trp3,Ser(Me)5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Ser(Me)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 584: des(1)-Ac-[D-Tyr2,D-Trp3,Dap(Ac)4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Dap(Ac)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 585: des(1)-Ac-[D-Tyr2,D-Trp3,Dap(For)4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 586: des(1)-Ac-[D-Tyr2,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Trp-Asn-Thr-D-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 589: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Nal(2)10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)-NH₂ Compound No. 590: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Thi10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Thi-NH₂ Compound No. 591: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Tyr10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Tyr-NH₂ Compound No. 592: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ Compound No. 594: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Hph10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Hph-NH₂ Compound No. 595: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Cha10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Cha-NH₂ Compound No. 596: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Leu10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Leu-NH₂ Compound No. 597: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-D-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 598: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 599: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Orn9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Orn-Trp-NH₂ Compound No. 600: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg-Trp-NH₂ Compound No. 601: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-D-Phe-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 602: des(1)-Ac-[D-NMeTyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-NMeTyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 603: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Thr-D-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 604: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Tos)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Tos)-Trp-NH₂ Compound No. 605: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(NO2)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(NO2)-Trp-NH₂ Compound No. 607: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)asym9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me2)asym-Trp-NH₂ Compound No. 608: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)sym9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me2)sym-Trp-NH₂ Compound No. 609: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Et)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Et)-Trp-NH₂ Compound No. 610: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys(Me2)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Lys(Me2)-Trp-NH₂ Compound No. 611: des(1)-Ac-[Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 612: des(1)-For-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 613: des(1)-Propionyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 614: des(1)-Amidino-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Amidino-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 615: des(1)-Ac-[Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 616: des(1)-Ac-[D-Ala2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Ala-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 617: des(1)-Ac-[D-Leu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Leu-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 618: des(1)-Ac-[D-Phe2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 619: des(1)-Ac-[D-Nal(1)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Nal(1)-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 620: des(1)-Ac-[D-Nal(2)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Nal(2)-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 621: des(1)-Ac-[D-Lys2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Lys-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 622: des(1)-Ac-[D-Glu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Glu-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 623: des(1)-Ac-[D-Tyr2,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 624: des(1)-Ac-[D-Tyr2,Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 625: des(1)-Ac-[D-Tyr2,D-Ala3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Ala-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 626: des(1)-Ac-[D-Tyr2,D-Leu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Leu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 627: des(1)-Ac-[D-Tyr2,D-Phe3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 628: des(1)-Ac-[D-Tyr2,D-Thr3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Thr-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 629: des(1)-Ac-[D-Tyr2,D-Lys3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Lys-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 630: des(1)-Ac-[D-Tyr2,D-Glu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Glu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 631: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Ala6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Ala-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 632: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Leu6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Leu-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 633: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Lys6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Lys-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 634: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Glu6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Glu-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 635: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Pya(4)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Pya(4)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 636: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,MePhe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-MePhe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 637: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 638: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 639: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Lys-Trp-NH₂ Compound No. 641: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ala8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Ala-Arg(Me)-Trp-NH₂ Compound No. 642: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Val8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Val-Arg(Me)-Trp-NH₂ Compound No. 643: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Phe8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Phe-Arg(Me)-Trp-NH₂ Compound No. 644: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ser8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Ser-Arg(Me)-Trp-NH₂ Compound No. 645: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Har-Trp-NH₂ Compound No. 646: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Har(Me)-Trp-NH₂ Compound No. 647: des(1)-Ac-[D-Tyr2,D-Trp3,Asp4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asp-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 648: [Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 649: Ac-[Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 650: [D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 651: Ac-[D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 652: des(1)-pGlu-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 pGlu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 653: des(1)-Ac-[D-Tyr2,D-Trp3,D-Asn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-D-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 654: des(1)-Ac-[D-Tyr2,D-Trp3,D-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-D-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 655: des(1)-Ac-[D-Tyr2,D-Trp3,MeAsn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-MeAsn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 656: des(1)-Ac-[D-Tyr2,D-Trp3,MeSer5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-MeSer-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 657: des(1)-Ac-[D-Tyr2,Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Pro-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 658: des(1)-Ac-[D-Tyr2,D-Pya(2)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 659: des(1)-Ac-[D-Tyr2,D-Trp3,allo-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-allo-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 660: des(1)-Ac-[D-Tyr2,D-Pya(3)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 661: des(1)-Ac-[D-Tyr2,D-Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pro-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 662: des(1)-Ac-[D-Tyr2,Tic3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Tic-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 663: des(1)-Ac-[D-Trp2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 664: des(1)-Ac-[Tyr2,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 665: des(1-2)-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 666: des(1-2)-Ac-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 667: des(1-2)-Hexanoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Hexanoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 668: des(1-2)-Cyclohexanecarbonyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Cyclohexanecarbonyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 669: des(1-2)-Benzoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 670: des(1-2)-3-Pyridinepropionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Pyridinepropionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 671: des(1-2)-Adipoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Adipionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 672: des(1)-Ac-[D-Tyr2,NMeTrp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-NMeTrp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 674: des(1-2)-6-Aminocaproyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 6-Aminocaproyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 675: [D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 676: Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 677: Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Nva8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Nva-Arg(Me)-Trp-NH₂ Compound No. 678: Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ile8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Ile-Arg(Me)-Trp-NH₂ Compound No. 679: des(1-2)-Amidino-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Amidino-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 680: des(1-2)-Glycoloyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Glycoloyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 681: des(1)-Glycoloyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Glycoloyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 682: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Gln8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Gln-Arg(Me)-Trp-NH₂ Compound No. 685: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 686: des(1)-Ac-[D-Tyr2,D-Trp3,Gly4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Gly-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 688: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Pya(4)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Pya(4)-Trp-NH₂ Compound No. 689: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,D-Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-D-Trp-NH₂ Compound No. 691: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Tyr-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 692: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Trp6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Trp-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 693: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr(Me)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Tyr(Me)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 694: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Nal(2)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Nal(2)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 695: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Thi6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Thi-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 696: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Cha-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 698: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Abu8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Abu-Arg(Me)-Trp-NH₂ Compound No. 699: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,γMeLeu8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-γMeLeu-Arg(Me)-Trp-NH₂ Compound No. 700: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Aib8,,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-Gly-Aib-Arg(Me)-Trp-NH₂ Compound No. 701: des(1)-Ac-[D-Tyr2,D-Trp3,Dap4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Dap-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 702: des(1)-Ac-[D-Tyr2,D-Trp3,Asp(NHMe)4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asp(NHMe)-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 703: des(1)-Ac-[D-Tyr2,D-Trp3,Asp(NMe2)4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asp(NMe2)-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂

However, the metastin derivatives (III) of the present invention do not include a peptide (native human metastin or its partial peptides) consisting of the following amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1, i.e., the amino acid sequence of 1-54 (Compound No. 1), 2-54, 3-54, 4-54, 5-54, 6-54, 7-54, 8-54, 9-54, 10-54, 11-54, 12-54, 13-54, 14-54, 15-54, 16-54, 17-54, 18-54, 19-54, 20-54, 21-54, 22-54, 23-54, 24-54, 25-54, 26-54, 27-54, 28-54, 29-54, 30-54, 31-54, 32-54, 33-54, 34-54, 35-54, 36-54, 37-54, 38-54, 39-54, 40-54 (Compound No. 2), 41-54, 42-54 (Compound No. 32), 43-54, 44-54, 45-54 (Compound No. 3), 46-54 (Compound No. 4), 47-54, 48-54 or 49-54.

In the metastin derivatives (II), all compounds that the groups shown by the respective symbols are optionally combined are preferably used. Among them, the compounds shown by Compound Numbers below are preferred.

Compound No. 332: des(1-5)-GuAmb-[AzaGly7,Arg(Me)9]MS10 GuAmb-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 333: des(1-5)-GuAmb-[Arg(Me)9]MS10 GuAmb-Phe-Gly-Leu-Arg(Me)-Phe-NH₂ Compound No. 334: des(1-5)-GuAmb-[AzaGly7,Arg(Me)9,Trp10]MS10 GuAmb-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 339: des(1-5)-3-(3-Indolyl)propionyl-[AzaGly7,Arg(Me)9]MS10 3-(3-Indolyl)propionyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 340: des(1-5)-3-(3-Pyridyl)propionyl-[AzaGly7,Arg(Me)9]MS10 3-(3-Pyridyl)propionyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 341: des(1-5)-Benzoyl-[AzaGly7,Arg(Me)9]MS10 Benzoyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 344: des(1-5)-Indole-3-carbonyl-[AzaGly7,Arg(Me)9]MS10 Indole-3-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 345: des(1-5)-Indole-3-acetyl-[AzaGly7,Arg(Me)9]MS10 Indole-3-acetyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 346: des(1-5)-Ac-[AzaGly7,Arg(Me)9]MS10 Ac-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 347: des(1-5)-n-Hexanoyl-[AzaGly7,Arg(Me)9]MS10 n-Hexanoyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 348: des(1-5)-Z-[AzaGly7,Arg(Me)9]MS10 Z-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 349: des(1-5)-Tos-[AzaGly7,Arg(Me)9]MS10 Tos-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 351: des(1-5)-Benzoyl-MS10 Benzoyl-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 352: des(1-5)-3-(3-Indolyl)propionyl-MS10 3-(3-Indolyl)propionyl-Phe-Gly-Leu-Arg-Phe-NH₂ Compound No. 353: des(1-5)-Benzoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 354: des(1-5)-3-(3-Indolyl)propionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 3-(3-Indolyl)propionyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 358: des(1-5)-Ac-[AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 362: des(1-6)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9]MS10 3-Phenylpropionyl-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 364: des(1-5)-2-(Indol-3-yl)ethylcarbamoyl-[AzaGly7,Arg(Me)9]MS10 2-(Indol-3-yl)ethylcarbamoyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 366: des(1-5)-n-Hexanoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 n-Hexanoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 367: des(1-5)-Z-[AzaGly7,Arg(Me)9,Trp10]MS10 Z-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 368: des(1-5)-Tos-[AzaGly7,Arg(Me)9,Trp10]MS10 Tos-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 369: des(1-5)-2-(Indol-3-yl)ethylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 2-(Indol-3-yl)ethylcarbamoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 373: des(1-6)-(2S)-2-acetoxy-3-phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (2S)-2-acetoxy-3-phenylpropionyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 374: des(1-6)-Z-[AzaGly7,Arg(Me)9,Trp10]MS10 Z-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 378: des(1-6)-Diphenylacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Diphenylacetyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 379: des(1-6)-(2S)-2-(3-Indolylprpionyloxy)-3-phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (2S)-2-(3-Indolylprpionyloxy)-3-phenylpropionyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 380: des(1-6)-(2S)-2-Benzoyloxy-3-phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (2S)-2-Benzoyloxy-3-phenylpropionyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 392: des(1-5)-Benzoyl-[Ala6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Ala-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 393: des(1-6)-Dibenzylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Dibenzylcarbamoyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 408: des(1-6)-1-Oxo-isochroman-3-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 1-Oxo-isochroman-3-carbonyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 412: des(1-6)-(2R)-2-Benzoyloxy-3-phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (2R)-2-Benzoyloxy-3-phenylpropionyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 417: des(1-6)-Benzylphenethylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Benzylphenethylcarbamoyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 421: des(1-5)-Benzoyl-[6Ψ7,CH2O,Arg(Me)9,Trp10]MS10 Benzoyl-PheΨ(CH2O)Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 423: des(1-5)-Benzoyl-[6Ψ7,NHCO,Arg(Me)9,Trp10]MS10 Benzoyl-PheΨ(NHCO)Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 428: des(1-6)-Dibenzylaminocarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Dibenzylaminocarbamoyl-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 431: des(1-5)-Benzoyl-[AzaPhe6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-AzaPhe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 432: des(1-5)-3-Pyridinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 3-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 434: des(1-7)-Dibenzylaminocarbamoylacetyl-[Arg(Me)9,Trp10]MS10 Dibenzylaminocarbamoylacetyl-Leu-Arg(Me)-Trp-NH₂ Compound No. 435: des(1-5)-2-Pyridinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 2-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 436: des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 437: des(1-5)-Propionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Propionyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 438: des(1-5)-Isobutyryl-[AzaGly7,Arg(Me)9,Trp10]MS10 Isobutyryl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 439: des(1-5)-Cyclohexanecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Cyclohexanecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 440: des(1-5)-Phenylacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Phenylacetyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 441: des(1-5)-Benzoyl-[Pya(2)6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Pya(2)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 442: des(1-5)-Benzoyl-[Pya(4)6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Pya(4)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 443: des(1-5)-2-Methylnicotinoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 2-Methylnicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 444: des(1-5)-5-Methylnicotinoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 5-Methylnicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 445: des(1-5)-6-Methylnicotinoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 6-Methylnicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 446: des(1-5)-Pyrazinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Pyrazinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 447: des(1-5)-Cyclopropanecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Cyclopropanecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 448: des(1-5)-Trifluoroacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Trifluoroacetyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 449: des(1-5)-Benzoyl-[Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Cha-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 450: des(1-5)-Benzyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Benzyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 451: des(1-5)-Cyclopropanecarbonyl-[Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 Cyclopropanecarbonyl-Cha-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 452: des(1-5)-(R)-3-hydroxy-2-methylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (R)-3-hydroxy-2-methylpropionyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 453: des(1-5)-2-Hydroxyisobutyryl-[AzaGly7,Arg(Me)9,Trp10]MS10 2-Hydroxyisobutyryl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 454: des(1-5)-3-Furancarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 3-Furancarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 455: des(1-5)-Pyrrole-2-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Pyrrole-2-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 459: des(1-5)-4-Imidazolecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 4-Imidazolecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 460: des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Val8,Arg(Me)9,Trp10]MS10 4-Pyridinecarbonyl-Phe-AzaGly-Val-Arg(Me)-Trp-NH₂ Compound No. 461: des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Arg(Me)9,Nal(2)10]MS10 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Nal(2)-NH₂ Compound No. 462: des(1-5)-6-Hydroxynicotinoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 6-Hydroxynicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 463: des(1-5)-6-Chloronicotinoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 6-Chloronicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 464: des(1-5)-6-(Trifluoromethyl)nicotinoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 6-(Trifluoromethyl)nicotinoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 466: des(1-5)-2-Azetidinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 2-Azetidinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 467: des(1-5)-Dimethylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Dimethylcarbamoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 468: des(1-5)-1-Azetidinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 1-Azetidinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 471: des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Arg(Me)9]MS10 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 472: des(1-5)-4-Aminobenzoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 4-Aminobenzoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 473: des(1-5)-4-Aminomethylbenzoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 4-Aminomethylbenzoyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 474: des(1-5)-Pyrrole-3-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Pyrrole-3-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 475: des(1-5)-Pyrimidine-4-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Pyrimidine-4-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 477: des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Orn9,Trp10]MS10 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Orn-Trp-NH₂ Compound No. 478: des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Har9,Trp10]MS10 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Har-Trp-NH₂ Compound No. 479: des(1-5)-Pyrimidine-2-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Pyrimidine-2-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 480: des(1-5)-Pyridazine-4-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Pyridazine-4-carbonyl-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 481: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har-Trp-NH₂ Compound No. 486: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Orn9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Orn-Phe-NH₂ Compound No. 487: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Lys9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Lys-Phe-NH₂ Compound No. 488: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har-Phe-NH₂ Compound No. 489: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har(Me)9]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Har(Me)-Phe-NH₂ Compound No. 490: des(1)-[D-Tyr2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 D-Tyr-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 491: des(1)-[D-Tyr2,D-Pya(4)3,Trp5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Trp-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 492: des(1)-[D-Tyr2,D-Pya(4)3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 493: des(1)-[D-Tyr2,D-Pya(4)3,Thr4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Thr-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 494: des(1,4)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 495: des(1-3)-[D-Tyr4,Pya(4)5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-Pya(4)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 496: des(1)-[D-Tyr2,D-Pya(4)3,Cha6,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 497: des(1)-[D-Tyr2,D-Pya(4)3,Cha6,Ala7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Cha-Ala-Leu-Arg(Me)-Trp-NH₂ Compound No. 498: des(1)-[D-Tyr2,D-Pya(4)3,Ile5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ile-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 499: des(1-3)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 500: des(1-3)-3-Phenylpropionyl-[Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 501: des(1)-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 502: des(1)-[D-Tyr2,Pya(4)3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-Pya(4)-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 503: des(1)-[D-Tyr2,D-Trp3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 504: [Acp1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 Acp-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 505: des(1-3)-3-Phenylpropionyl-[Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 506: des(1-3)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ile-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 507: des(1-3)-3-Phenylpropionyl-[Trp6,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Trp-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 508: des(1-3)-3-Phenylpropionyl-[Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 509: des(1-3)-Benzoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 510: des(1-3)-Ac-[AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 511: des(1)-[D-Tyr2,D-Trp3,Ala4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Ala-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 512: des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 513: des(1)-[D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Abu-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 514: des(1)-[D-Tyr2,D-Phe3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Phe-Ala-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 515: des(1)-[D-Tyr2,D-Pya(4)3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 516: des(1)-Ac-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 517: des(1-3)-3-Phenylpropionyl-[Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Hyp-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 518: des(1-3)-3-Phenylpropionyl-[Cha6,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser-Cha-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 519: des(1-3)-Phenylacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Phenylacetyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 521: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg-Phe-NH₂ Compound No. 522: des(1-3)-Benzoyl-[Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 523: des(1-3)-Benzoyl-[Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 524: des(1-3)-3-Phenylpropionyl-[Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Pro-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 527: des(1)-[D-Tyr2,D-Pya(4)3,Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Hyp-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 528: des(1)-[D-Tyr2,D-Pya(4)3,Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Pro-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 529: des(1)-[D-Tyr2,D-Pya(4)3,Tle5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Tle-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 530: des(1)-[D-Tyr2,D-Pya(4)3,Phg5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Phg-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 531: des(1-3)-3-Phenylpropionyl-[Pic(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Pic(2)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 532: des(1-3)-3-Phenylpropionyl-[Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Aze(2)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 533: des(1-3)-3-Phenylpropionyl-[D-Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-D-Pro-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 534: des(1-3)-Cyclopropanecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 Cyclopropanecarbonyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 535: des(1-3)-2-Naphthoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 2-Naphthoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 536: [Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 Arg-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 537: Arg-[Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 Arg-Arg-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 538: Arg-[Acp1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 Arg-Acp-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 539: des(1)-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 540: des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 541: D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 542: D-Arg-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 545: des(1-3)-Benzoyl-[Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-Asn-Ser-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 546: des(1-3)-3-Phenylpropionyl-[Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Phenylpropionyl-Asn-Ser(Ac)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 547: des(1)-[D-Tyr2,D-Pya(4)3,Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Ser(Ac)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 548: des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,10Ψ,CSNH]MS10 D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-PheΨ(CSNH)NH₂ Compound No. 550: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 551: Ac-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 552: D-Dap-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 553: D-Nle-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Nle-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 554: D-Arg-[β-Ala1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-β-Ala-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 555: D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 556: D-Arg-D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 557: D-Arg-D-Arg-D-Arg-[γ-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-D-Arg-D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 558: des(1)-Ac-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 559: des(1-2)-3-(4-Hydroxyphenyl)propionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9, Trp10]MS10 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 561: D-Arg-[Acp1,D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 D-Arg-Acp-D-Tyr-D-Trp-Abu-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 562: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 563: des(1)-Ac-[D-Tyr2,D-Trp3,Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Aze(2)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 564: des(1)-Ac-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 565: des(1)-Benzoyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 566: des(1)-Cyclopropanecarbonyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9, Trp10]MS10 Cyclopropanecarbonyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 567: des(1)-Butyryl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Butyryl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 568: Ac-[D-Arg1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Arg-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 569: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,6Ψ7,CH₂NH,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-PheΨ(CH₂NH)Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 570: des(1)-Me-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Me-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 571: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 572: des(1)-[D-Trp2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 D-Trp-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 573: des(1)-Ac-[D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Abu-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 576: des(1)-Ac-[D-Tyr2,D-Trp3,Gln4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Gln-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 577: des(1)-Ac-[D-Tyr2,D-Trp3,Ser4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Ser-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 578: des(1)-Ac-[D-Tyr2,D-Trp3,Thr4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Thr-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 579: des(1)-Ac-[D-Tyr2,D-Trp3,Alb4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 580: des(1)-Ac-[D-Tyr2,D-Trp3,Ser(Me)5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Ser(Me)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 584: des(1)-Ac-[D-Tyr2,D-Trp3,Dap(Ac)4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Dap(Ac)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 585: des(1)-Ac-[D-Tyr2,D-Trp3,Dap(For)4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 586: des(1)-Ac-[D-Tyr2,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Trp-Asn-Thr-D-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 589: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Nal(2)10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)-NH₂ Compound No. 590: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Thi(2)10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Thi-NH₂ Compound No. 591: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Tyr10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Tyr-NH₂ Compound No. 592: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ Compound No. 594: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Hph10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Hph-NH₂ Compound No. 595: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Cha10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Cha-NH₂ Compound No. 596: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Leu10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Leu-NH₂ Compound No. 597: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-D-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 598: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 599: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Orn9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Orn-Trp-NH₂ Compound No. 600: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg-Trp-NH₂ Compound No. 601: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-D-Phe-Gly-Leu-Arg(Me)-Trp-NH₂ Compound No. 602: des(1)-Ac-[D-NMeTyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-NMeTyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 603: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Thr-D-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 604: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Tos)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Tos)-Trp-NH₂ Compound No. 605: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(NO2)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(NO2)-Trp-NH₂ Compound No. 607: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)asym9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me2)asym-Trp-NH₂ Compound No. 608: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)sym9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me2)sym-Trp-NH₂ Compound No. 609: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Et)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Et)-Trp-NH₂ Compound No. 610: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys(Me2)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Lys(Me2)-Trp-NH₂ Compound No. 611: des(1)-Ac-[Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 612: des(1)-For-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 613: des(1)-Propionyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 614: des(1)-Amidino-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Amidino-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 615: des(1)-Ac-[Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 616: des(1)-Ac-[D-Ala2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Ala-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 617: des(1)-Ac-[D-Leu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Leu-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 618: des(1)-Ac-[D-Phe2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 619: des(1)-Ac-[D-Nal(1)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Nal(1)-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 620: des(1)-Ac-[D-Nal(2)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Nal(2)-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 621: des(1)-Ac-[D-Lys2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Lys-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 622: des(1)-Ac-[D-Glu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Glu-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 623: des(1)-Ac-[D-Tyr2,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 624: des(1)-Ac-[D-Tyr2,Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 625: des(1)-Ac-[D-Tyr2,D-Ala3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Ala-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 626: des(1)-Ac-[D-Tyr2,D-Leu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Leu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 627: des(1)-Ac-[D-Tyr2,D-Phe3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 628: des(1)-Ac-[D-Tyr2,D-Thr3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Thr-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 629: des(1)-Ac-[D-Tyr2,D-Lys3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Lys-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 630: des(1)-Ac-[D-Tyr2,D-Glu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Glu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 631: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Ala6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Ala-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 632: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Leu6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Leu-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 633: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Lys6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Lys-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 634: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Glu6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Glu-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 635: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Pya(4)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Pya(4)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 636: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,NMePhe6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-MePhe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 637: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 638: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 639: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Lys-Trp-NH₂ Compound No. 641: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ala8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Ala-Arg(Me)-Trp-NH₂ Compound No. 642: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Val8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Val-Arg(Me)-Trp-NH₂ Compound No. 643: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Phe8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Phe-Arg(Me)-Trp-NH₂ Compound No. 644: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ser8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Ser-Arg(Me)-Trp-NH₂ Compound No. 645: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Har-Trp-NH₂ Compound No. 646: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Har(Me)-Trp-NH₂ Compound No. 647: des(1)-Ac-[D-Tyr2,D-Trp3,Asp4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asp-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 648: [Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 649: Ac-[Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 650: [D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 651: Ac-[D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 652: pGlu-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 pGlu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 653: des(1)-Ac-[D-Tyr2,D-Trp3,D-Asn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-D-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 654: des(1)-Ac-[D-Tyr2,D-Trp3,D-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-D-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 655: des(1)-Ac-[D-Tyr2,D-Trp3,NMeAsn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-NMeAsn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 656: des(1)-Ac-[D-Tyr2,D-Trp3,NMeSer5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-NMeSer-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 657: des(1)-Ac-[D-Tyr2,Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Pro-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 658: des(1)-Ac-[D-Tyr2,D-Pya(2)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 659: des(1)-Ac-[D-Tyr2,D-Trp3,allo-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-allo-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 660: des(1)-Ac-[D-Tyr2,D-Pya(3)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 661: des(1)-Ac-[D-Tyr2,D-Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Pro-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 662: des(1)-Ac-[D-Tyr2,Tic3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-Tic-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 663: des(1)-Ac-[D-Trp2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 664: des(1)-Ac-[Tyr2,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 665: des(1-2)-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 666: des(1-2)-Ac-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 667: des(1-2)-Hexanoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Hexanoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 668: des(1-2)-Cyclohexanecarbonyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Cyclohexanecarbonyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 669: des(1-2)-Benzoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Benzoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 670: des(1-2)-3-Pyridinepropionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 3-Pyridinepropionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 671: des(1-2)-Adipoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Adipoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No.: 672-Ac-[D-Tyr2,NMeTrp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-NMeTrp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 674: des(1-2)-6-Aminocaproyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 6-Aminocaproyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 675: [D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 676: Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 677: Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Nva8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Nva-Arg(Me)-Trp-NH₂ Compound No. 678: Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ile8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Ile-Arg(Me)-Trp-NH₂ Compound No. 679: des(1-2)-Amidino-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Amidino-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 680: des(1-2)-Glycoloyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Glycoloyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 681: des(1)-Glycoloyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Glycoloyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 682: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Gln8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Gln-Arg(Me)-Trp-NH₂ Compound No. 685: des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9]MS10 Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ Compound No. 686: des(1)-Ac-[D-Tyr2,D-Trp3,Gly4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Gly-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 688: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Pya(4)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Pya(4)-Trp-NH₂ Compound No. 689: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,D-Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-D-Trp-NH₂ Compound No. 691: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Tyr-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 692: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Trp6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Trp-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 693: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr(Me)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Tyr(Me)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 694: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Nal(2)6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Nal(2)-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 695: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Thi6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Thi-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 696: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Cha-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 698: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Abu8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Abu-Arg(Me)-Trp-NH₂ Compound No. 699: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,γMeLeu8,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-γMeLeu-Arg(Me)-Trp-NH₂ Compound No. 700: des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Aib8,,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asn-Thr-Phe-Gly-Aib-Arg(Me)-Trp-NH₂ Compound No. 701: des(1)-Ac-[D-Tyr2,D-Trp3,Dap4,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Dap-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 702: des(1)-Ac-[D-Tyr2,D-Trp3,Asp(NHMe)4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asp(NHMe)-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ Compound No. 703: des(1)-Ac-[D-Tyr2,D-Trp3,Asp(NMe2)4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 Ac-D-Tyr-D-Trp-Asp(NMe2)-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂

For metastin derivatives (II), preferably used are metastin derivatives represented by the formula:

XX0-XX2-XX3-XX4-XX5-XX6-AzaGly-XX8-XX9-XX10-NH₂

(wherein:

XX0 represents formyl, C₁₋₆ alkanoyl (e.g., acetyl, propionyl, butyryl, hexanoyl, and so on; preferably acetyl, propionyl, butyryl; more preferably acetyl), cyclopropanecarbonyl, 6-(acetyl-D-arginylamino)caproyl, 6-((R)-2,3-diaminopropionylamino)caproyl, 6-(D-norleucylamino)caproyl, 4-(D-arginylamino)butyryl, or 3-(4-Hydroxyphenyl)propionyl, glycyl. tyrosyl, acetylglycyl, acetyltyrosyl, D-tyrosyl, acetyl-D-tyrosyl, pyroglutamyl, 3-(pyridine-3-yl)propionyl, adipoyl or 6-aminocaproyl (preferably acetyl and the like);

XX2 represents Tyr, D-Tyr, D-Ala, D-Leu, D-Phe, D-Lys, D-Trp or bond arm (preferably D-Tyr or bond arm; more preferably D-Tyr);

XX3 represents Trp, Pro, 4-pyridylalanine, Tic, D-Trp, D-Ala, D-Leu, D-Phe, D-Lys, D-Glu, D-2-pyridylalanine, D-3-pyridylalanine or D-4-pyridylalanine (preferably D-Trp or D-4-pyridylalanine);

XX4 represents Asn, 2-amino-3-ureidopropion acid, N^(β)-formyldiaminopropionic acid or N⁶²-acetyldiaminopropionic acid (preferably Asn);

XX5 represents Ser, Thr or Val (preferably Ser or Thr);

XX6 represents Phe, Tyr, Trp, Tyr(Me), Thi, Nal(2), Cha, 4-pyridylalanine or 4-fluorophenylalanine (preferably Phe or 4-fluorophenylalanine);

AzaGly represents azaglycine;

XX8 represents Leu, Nva or Val (preferably Leu);

XX9 represents Arg, OrnArg(Me), or Arg(symMe2) (preferably Arg(Me));

XX10 represents Phe, Trp, 2-naphthylalanine, 2-thienylalanine, tyrosine or 4-fluorophenylalanine (preferably Phe or Trp)), or a salt thereof. Further, compounds represented by the following compound number are preferred:

Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 550), Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 551), D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 552), Ac-D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 558), 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 559), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 562), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 571), Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 579), Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 585), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)-NH₂ (Compound No. 589), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ (Compound No. 592), For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 612), Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 613), Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 618), Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 627), Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 637), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 638), Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 658), Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 660), Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 663), or salts thereof.

The metastin derivatives (II) of the present invention or their salts or prodrugs have excellent blood stability, in addition to excellent effects of suppressing cancer metastasis and cancer growth, and are useful as agents for preventing or treating cancers (for example, lung cancer, gastric cancer, liver cancer, pancreatic cancer, colorectal cancer, rectal cancer, colonic cancer, prostate cancer, ovarian cancer, cervical cancer, breast cancer, etc.). The metastin derivatives (II) of the present invention or their salts or prodrugs have an effect of controlling pancreatic function and are useful as agents for preventing or treating pancreatic diseases (e.g., acute or chronic pancreatitis, pancreatic cancer, etc.). The metastin derivatives (II) of the present invention or their salts or prodrugs have an effect of controlling placental function and are useful as agents for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery.

Moreover, the metastin derivatives (II) of the present invention or their salts or prodrugs have effects of increasing sugar level, promoting pancreatic glucagon secretion and promoting urine formation, and are useful as agents for preventing or treating obesity, hyperlipemia, type II diabetes mellitus, hypoglycemia, hypertension, diabetic neuropathy, diabetic nephropathy, diabetic retinopathy, edema, urinary disturbances, insulin resistance, unstable diabetes, fatty atrophy, insulin allergy, insulinoma, arteriosclerosis, thrombotic disorders or lipotoxicity.

In addition, the metastin derivatives (II) of the present invention or their salts or prodrugs have excellent activities of promoting gonadotropic hormone secretion, promoting sex hormone secretion, inducing ovulation or stimulating ovulation, and are useful as low toxic and stable agents, e.g., agents for improving gonadal function, agents for preventing or treating hormone-dependent cancer (e.g., prostate cancer, breast cancer, etc.), infertility, endometriosis, early puberty, myoma of the uterus, etc., agents for inducing or stimulating ovulation, gonadotropic hormone secretagogue agents, contraceptives, sex hormone secretagogue agents, or the like.

Furthermore, the metastin derivatives (II) of the present invention or their salts or prodrugs are useful as agents for preventing or treating Alzheimer's disease, moderate cognitive impairment, etc.

The metastin derivatives (III) [including the metastin derivatives (II) and the metastin derivatives (I)] of the present invention or their salts or prodrugs are useful as agents for suppressing gonadotropic hormone secretion or sex hormone secretion; down-regulating agents for gonadotropic hormone or sex hormone; down-regulating agents for human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO: 9; agents for preventing or treating hormone-dependent cancers (e.g., prostate cancer, breast cancer, etc.; particularly, hormone-sensitive breast cancer, hormone-sensitive prostate cancer, etc.); agents for preventing or treating endometriosis; agents for inhibiting ovarian follicular maturation; menstrual cycle-suspending agents; agents for treating myoma of the uterus; agents for treating early puberty; contraceptives, etc.

In addition, the metastin derivatives (III) [including the metastin derivatives (II) and the metastin derivatives (I)] of the present invention or their salts or prodrugs are useful as an agent for potentiating immunity (prophylactic agent for infection after bone-marrow transplant, an agent for potentiating immunity intended for cancer); a prophylactic/therapeutic agent for bulbospinal muscular atrophy; an agent for protecting ovary; a prophylactic/therapeutic agent for benign prostate hypertrophy (BPH); a prophylactic/therapeutic agent for gender identity disorder; or an agent for in vitro fertilization (IVF). In addition, it is useful as a prophylactic/therapeutic agent for infertility, hypogonadism, oligospermia, azoospermia, aspermia, asthenospermia, or necrospermia. Further, it is useful for hormone-dependent diseases such as prostate cancer, uterine cancer, breast cancer, sex hormone dependent cancer like hypohysial tumor, prostate gland enlargement, endometriosis, uterine fibroid, early puberty, dysmenorrhea, amenorrhea, menstrual syndrome, multilocular ovary syndrome, postoperative relapse of the above-mentioned cancers, metastasis of the above-mentioned cancers, hypopituitarism, dwarfism (the case where the secretion of growth hormone was compromised associating with hyposecretion of pituitary hormone), menopausal disorder, indefinite complaint, sex hormone dependent disorders such as calcium phosphor bone metabolic disorders. It is applicable for contraception (or infertility when rebound effects after cessation of the drug are utilized).

Furthermore, metastin per se, DNA encoding metastin, etc. are also useful as agents for suppressing gonadotropic hormone secretion or sex hormone secretion; down-regulating agents for gonadotropic hormone or sex hormone; down-regulating agents for human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO: 9; agents for preventing or treating hormone-dependent cancers (e.g., prostate cancer, breast cancer, etc.; particularly, hormone-sensitive prostate cancer, hormone-sensitive breast cancer, etc.); agents for preventing or treating endometriosis; agents for inhibiting ovarian follicular maturation; menstrual cycle-suspending agents; agents for treating myoma of the uterus; agents for treating early puberty; contraceptives, etc.

BEST MODE FOR CARRYING OUT THE INVENTION

The metastin derivatives (I) and (II) of the present invention can be prepared by publicly known methods for peptide synthesis. As the methods for peptide synthesis, for example, either solid phase synthesis or liquid phase synthesis may be used. That is, the partial peptide or amino acids that can constitute the peptide of the present invention are repeatedly condensed with the remaining part to give the product having a desired sequence. Where the product has protecting groups, these protecting groups are removed to give the desired peptide. Publicly known methods for condensation and removal of the protecting groups are described in (i) to (v) below.

-   (1) M. Bodanszky & M. A. Ondetti: Peptide Synthesis, Interscience     Publishers, New York (1966) -   (2) Schroeder & Luebke: The Peptide, Academic Press, New York (1965) -   (3) Nobuo Izumiya, et al.: Peptide Gosei-no-Kiso to Jikken (Basics     and experiments of peptide synthesis), published by Maruzen Co.     (1975) -   (4) Haruaki Yajima & Shunpei Sakakibara: Seikagaku Jikken Koza     (Biochemical Experiment) 1, Tanpakushitsu no Kagaku (Chemistry of     Proteins) IV, 205 (1977) -   (5) Haruaki Yajima, ed.: Zoku Iyakuhin no Kaihatsu (A sequel to     Development of Pharmaceuticals), Vol. 14, Peptide Synthesis,     published by Hirokawa Shoten

After completion of the reaction, the product may be purified and isolated by a combination of conventional purification methods such as solvent extraction, distillation, column chromatography, liquid chromatography and recrystallization to give the partial peptide of the present invention. When the peptide obtained by the above methods is in a free form, the peptide can be converted into an appropriate salt by a publicly known method; when the protein is obtained in a salt form, it can be converted into its free form by publicly known methods.

For condensation of the protected amino acids or peptides, a variety of activation reagents for protein synthesis may be used, but trisphosphonium salts, tetramethyluronium salts, carbodiimides, etc. are particularly preferred. Examples of trisphosphonium salts include benzotriazol-1-yloxytris(pyrrolidino)phosphonium hexafluorophosphate (PyBOP), bromotris(pyrrolidino) phosphonium hexafluorophosphate (PyBroP) and 7-azabenzotriazol-1-yloxytris(pyrrolidino)phosphonium hexafluorophosphate (PyAOP), examples of tetramethyluronium salts include 2-(1H-benzotriazol-1-yl)-1,1,3,3-hexafluorophosphate (HBTU), 2-(7-azabenzotriazol-1-yl)-1,1,3,3-hexafluorophosphate (HATU), 2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TBTU), 2-(5-norbornene-2,3-dicarboxyimido)-1,1,3,3-tetramethyluronium tetrafluoroborate (TNTU) and O—(N-succimidyl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TSTU); examples of carbodiimides include DCC, N,N′-diisopropylcarbodiimide (DIPCDI) and N-ethyl-N′-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDCI.HCl); etc. For condensation using these reagents, the addition of racemization inhibitors (e.g., HONB, HOBt, HOAt, HOOBt, etc.) is preferred. Solvents used in condensation may be appropriately chosen from solvents that are known to be usable for condensation. For example, acid amides such as anhydrous or hydrous N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone, etc., halogenated hydrocarbons such as methylene chloride, chloroform, etc., alcohols such as trifluoroethanol, phenol, etc., sulfoxides such as dimethyl sulfoxide, etc., tertiary amines such as pyridine, etc., ethers such as dioxane, tetrahydrofuran, etc., nitriles such as acetonitrile, propionitrile, etc., esters such as methyl acetate, ethyl acetate, etc., or suitable mixtures thereof, etc. are used. The reaction temperature is appropriately chosen from the range known to be applicable to peptide binding reactions and is normally suitably chosen from the range of about −20° C. to 50° C. The activated amino acid derivatives are used generally in 1.5 to 6 times excess. In the case of solid phase synthesis, the condensation is examined using the ninhydrin reaction; when the condensation is insufficient, the condensation can be completed by repeating the condensation reaction without removal of the protecting groups. When the condensation is yet insufficient even after repeating the reaction, the unreacted amino acids are acylated with acetic anhydride or acetylimidazole to cancel any adverse effect on the subsequent reaction.

Examples of the protecting groups used to protect amino groups in the starting amino acids include Z, Boc, tert-pentyloxycarbonyl, isobornyloxycarbonyl, 4-methoxybenzyloxycarbonyl, Cl-Z, Br-Z, adamantyloxycarbonyl, trifluoroacetyl, phthaloyl, formyl, 2-nitrophenylsulphenyl, diphenylphosphinothioyl, Fmoc, trityl, etc. Examples of protecting groups for a carboxyl group include, in addition to the C₁₋₆ alkyl group, C₃₋₈ cycloalkyl group and C₇₋₁₄ aralkyl group for R described above, allyl, 2-adamantyl, 4-nitrobenzyl, 4-methoxybenzyl, 4-chlorobenzyl, phenacyl group, benzyloxycarbonylhydrazide, tert-butoxycarbonylhydrazide, tritylhydrazide, etc.

The hydroxyl group of serine and threonine can be protected, for example, by esterification or etherification. Examples of groups suitable for this esterification include a lower (C₂₋₄) alkanoyl group such as acetyl group, an aroyl group such as benzoyl group, etc. and a group derived from organic acid. Examples of a group suitable for the etherification include benzyl group, tetrahydropyranyl group, tert-butyl group, trytyl group (Trt), etc.

Examples of groups for protecting the phenolic hydroxyl group of tyrosine include BZl, Cl₂-BZl, 2-nitrobenzyl, Br-Z, tert-butyl, etc.

Examples of groups used to protect the imidazole moiety of histidine include Tos, 4-methoxy-2,3,6-trimethylbenzenesulfonyl (Mtr), DNP, Bom, Bum, Boc, Trt, Fmoc, etc.

Examples of protecting groups for a guanidino group of arginine include Tos, Z, 4-methoxy-2,3,6-trimethylbenzenesulfonyl (Mtr), p-methoxybenzenesulfonyl (MBS), 2,2,5,7,8-pentamethylchroman-6-sulfonyl (Pmc), mesitylene-2-sulfonyl (Mts), 2,2,4,6,7-pentamethyldihydrobenzofuran-5-sulfonyl (Pbf), Boc, Z, NO₂, etc.

Examples of protecting groups for side chain amino group of lysine include Z, CI-Z, trifluoroacetyl, Boc, Fmoc, Trt, Mtr, 4,4-dimethyl-2,6-dioxocyclohexylideneyl (Dde), etc.

Examples of protecting groups for indolyl of tryptophan include formyl (For), Z, Boc, Mts, Mtr, etc.

A protecting group for asparagine and glutamine include Trt, xanthyl (Xan), 4,4′-dimethoxybenzhydryl (Mbh), 2,4,6-trimethoxybenzyl (Tmob), etc.

Examples of the activated carboxyl groups in the starting material include the corresponding acid anhydrides, azides, activated esters [esters with alcohols (e.g., pentachlorophenol, 2,4,5-trichlorophenol, 2,4-dinitrophenol, cyanomethyl alcohol, p-nitrophenol, HONB, N-hydroxysuccimide, 1-hydroxybenzotriazole (HOBt) or 1-hydroxy-7-azabenzotriazole (HOAt)], etc. As the amino acids in which the amino groups in the starting material are activated, the corresponding phosphoric amides are employed.

To eliminate (split off) the protecting groups, there are used catalytic reduction under hydrogen gas flow in the presence of a catalyst such as Pd-black or Pd-carbon; an acid treatment with anhydrous hydrogen fluoride, methanesulfonic acid, trifluoromethanesulfonic acid, trifluoroacetic acid, trimethylsilane bromide (TMSBr), trimethylsilyl trifluoromethanesulfonate, tetrafluoroboric acid, tris(trifluoro)boron, boron tribromide or a mixed solution thereof, a base treatment with diisopropylethylamine, triethylamine, piperidine, piperazine, etc., and reduction with sodium in liquid ammonia. The elimination of protecting groups by the acid treatment described above is carried out generally at a temperature of approximately −20° C. to 40° C. In the acid treatment, it is efficient to add a cation scavenger such as anisole, phenol, thioanisole, m-cresol, p-cresol, etc., dimethylsulfide, 1,4-butanedithiol, 1,2-ethanedithiol, etc. Furthermore, 2,4-dinitrophenyl group known as the protecting group for the imidazole of histidine is removed by a treatment with thiophenol. Formyl group used as the protecting group of the indole of tryptophan is removed by the aforesaid acid treatment in the presence of 1,2-ethanedithiol, 1,4-butanedithiol, etc. as well as by a treatment with an alkali such as a dilute sodium hydroxide solution, dilute ammonia, etc.

Protection of functional groups that should not be involved in the reaction of the starting materials, protecting groups, removal of the protecting groups and activation of functional groups involved in the reaction may be appropriately chosen from publicly known groups and publicly known means.

In another method for obtaining the amides of the peptide, for example, the α-carboxyl group of the carboxy terminal amino acid is first protected by amidation; the peptide chain is then extended from the amino group side to a desired length. Thereafter, a peptide in which only the protecting group of the N-terminal α-amino group in the peptide chain has been removed from the peptide and a peptide (or an amino acid) in which only the protecting group of the C-terminal carboxyl group has been eliminated are prepared. The two peptides are condensed in a mixture of the solvents described above. The details of the condensation reaction are the same as described above. After the protected peptide obtained by the condensation is purified, all the protecting groups are removed by the method described above to give the desired crude peptide. This crude peptide is purified by various known purification means. Lyophilization of the major fraction gives the amide of the desired peptide.

When the metastin derivatives (I) and (II) of the present invention are present as a configurational isomer, a diastereomer, a conformer or the like, each can be isolated by the separating and purifying means described above, if desired. In addition, when the compound of the present invention is racemic, it can be separated into an S isomer and an R isomer by the conventional optical resolving means.

When the metastin derivatives (I) and (II) of the present invention have steric isomers, the present invention includes both of these isomers alone and the isomers present as a mixture thereof.

In addition, the metastin derivatives (I) and (II) of the present invention may be hydrated or non-hydrated.

The metastin derivatives (I) and (II) of the present invention may be labeled with an isotope (e.g., ³H, ¹⁴C, ³⁵S), etc.

Throughout the present specification, the peptides are represented in accordance with the conventional way of describing peptides, that is, the N-terminus (amino terminus) at the left hand and the C-terminus (carboxyl terminus) at the right hand. In the peptides, the C-terminus is usually in the form of an amide (—CONH₂), a carboxyl group (—COOH), a carboxylate (—COO⁻), an alkylamide (—CONHR) or an ester

(—COOR) and the amide (—CONH₂) is particularly preferred. Examples of the ester or alkylamide as R include a C₁₋₆ alkyl group such as methyl, ethyl, n-propyl, isopropyl, n-butyl, etc.; a C₃₋₈ cycloalkyl group such as cyclopentyl, cyclohexyl, etc.; a C₆₋₁₂ aryl group such as phenyl, α-naphthyl, etc.; a C₇₋₁₄ aralkyl group such as a phenyl-C₁₋₂-alkyl group, e.g., benzyl, phenethyl, etc., or an α-naphthyl-C₁₋₂-alkyl group such as α-naphthylmethyl, etc.; pivaloyloxymethyl group, which are widely used as an ester for oral use, and the like.

Examples of a salt of the metastin derivative (I) of the present invention include a metal salt, a salt with ammonium, a salt with an organic base, a salt with inorganic acid, a salt with organic acid, a salt with basic or acidic amino acid, and the like. Preferred examples of the metal salt include alkali metal salts such as sodium salts, potassium salts, etc.; alkaline earth metal salts such as calcium salts, magnesium salts, barium salts, etc.; aluminum salts; and the like. Preferred examples of the salts with organic bases include salts with trimethylamine, triethylamine, pyridine, picoline, 2,6-lutidine, ethanolamine, diethanolamine, triethanolamine, cyclohexylamine, dicyclohexylamine, N,N′-dibenzylethylenediamine, etc. Preferred examples of the salts with inorganic acids include salts with hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, phosphoric acid, etc. Preferred examples of salts with organic acids include salts with formic acid, acetic acid, trifluoroacetic acid, phthalic acid, fumaric acid, oxalic acid, tartaric acid, maleic acid, citric acid, succinic acid, malic acid, methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid, etc. Preferred examples of salts with basic amino acids include salts with arginine, lysine, ornithine, etc., and preferred examples of salts with acidic amino acids include salts with aspartic, glutamic acid, etc.

Among them, pharmaceutically acceptable salts are preferable. For example, when the compound has an acidic functional group, inorganic salts such as alkali metal salts (e.g., sodium salt, potassium salt, etc.), alkaline earth metal salts (e.g., calcium salt, magnesium salt, barium salt, etc.), ammonium salts, etc. are preferable. When the compound has a basic functional group, salts with inorganic acids with hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, phosphoric acid, etc., and salts with organic acids such as acetic acid, phthalic acid, fumaric acid, oxalic acid, tartaric acid, maleic acid, citric acid, succinic acid, methanesulfonic acid, p-toluenesulfonic acid, etc. are preferable.

A prodrug of the metastin derivative (III) or a salt thereof (hereinafter sometimes simply referred to as the metastin derivative (III) of the present invention) means a metastin derivative that is converted into the metastin derivative (III) of the present invention under physiological conditions or with a reaction due to an enzyme, a gastric acid, etc., in the living body. That is, the prodrug of the present invention is a metastin derivative that undergoes enzymatic oxidation, reduction, hydrolysis, etc. to be converted into the metastin derivative (III) of the present invention, or a metastin derivative that undergoes hydrolysis, etc. by gastric acid, etc. to be converted into the metastin derivative (III) of the present invention.

The prodrugs of the metastin derivative (I) of the present invention or salts thereof (hereinafter sometimes simply referred to as the metastin derivative (I) of the present invention) and the prodrugs of the metastin derivative (II) of the present invention or salts thereof (hereinafter sometimes simply referred to as the metastin derivative (II) of the present invention), which can be used, are the same as those described for the prodrugs of the metastin derivative (III) of the present invention.

Examples of the prodrugs of the metastin derivatives (III) of the present invention include metastin derivatives wherein an amino group of the metastin derivative (III) of the present invention is substituted with an acyl, an alkyl, phosphoric acid, etc. (e.g., metastin derivatives wherein an amino group of the metastin derivative (III) of the present invention is substituted with eicosanoyl, alanyl, pentylaminocarbonyl (5-methyl-2-oxo-1,3-dioxolen-4-yl)methoxycarbonyl, tetrahydrofuranyl, pyrrolidylmethyl, pivaloyloxymethyl, tert-butyl, etc); metastin derivatives wherein a hydroxy group of the metastin derivative (I) of the present invention is substituted with an acyl, an alkyl, phosphoric acid, boric acid, etc. (e.g., metastin derivatives wherein an hydroxy group of the metastin derivative (III) of the present invention is substituted with acetyl, palmitoyl, propanoyl, pivaloyl, succinyl, fumaryl, alanyl, dimethylaminomethylcarbonyl, etc.); and metastin derivatives wherein a carboxyl group of the metastin derivative (III) of the present invention is substituted with ester, amide, etc. (e.g., metastin derivatives wherein a carboxyl group of the metastin derivative (III) of the present invention is substituted with ethyl ester, phenyl ester, carboxymethyl ester, dimethylaminomethyl ester, pivaloyloxymethyl ester, ethoxycarbonyloxyethyl ester, phthalidyl ester, (5-methyl-2-oxo-1,3-dioxolen-4-yl)methyl ester, cyclohexyloxycarbonylethyl ester, methylamide, etc); and the like. These metastin derivatives can be produced from the metastin derivative (I) of the present invention by per se known methods.

The prodrugs of the metastin derivative (III) of the present invention may be those that are converted into the metastin derivative (III) of the present invention under the physiological conditions as described in “Pharmaceutical Research and Development”, Vol. 7 (Drug Design), pages 163-198, published 1990 by Hirokawa Publishing Co.

The metastin derivatives (I), (II) or (III) of the present invention or their salts or prodrugs (hereinafter sometimes simply referred to as the compound of the present invention) possess a cancer metastasis suppressing activity or a cancer growth suppressing activity. Thus, the metastin derivatives are useful for pharmaceuticals such as agents for preventing or treating all cancers (e.g., lung cancer, gastric cancer, liver cancer, pancreas cancer, colorectal cancer, rectal cancer, colonic cancer, prostate cancer, ovarian cancer, cervical cancer, breast cancer, etc.).

The compounds of the present invention also possess the effect of controlling pancreatic function and are thus useful as agents for preventing or treating various pancreatic diseases (e.g., acute or chronic pancreatitis, pancreatic cancer, etc.) as agents for controlling pancreatic function.

The compounds of the present invention also possess the effect of controlling placental function and are thus useful as pharmaceuticals for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery, as agents for controlling placental function.

Furthermore, the compounds of the present invention possess the effects of increasing sugar level, promoting pancreatic glucagon secretion and promoting urine formation and are thus useful as pharmaceuticals such as hyperglycemic agents, pancreatic glucagon secretagogue agents or agents for promoting urine formation, which are useful for preventing or treating obesity, hyperlipemia, type II diabetes mellitus, hypoglycemia, hypertension, diabetic neuropathy, diabetic nephropathy, diabetic retinopathy, edema, urinary disturbances, insulin resistance, unstable diabetes, fatty atrophy, insulin allergy, insulinoma, arteriosclerosis, thrombotic disorders or lipotoxicity.

In addition, the compounds of the present invention also possess the effects of promoting gonadotropic hormone (e.g., FSH, LH, etc.) secretion, promoting sex hormone [e.g., androgens (e.g., testosterone, androstenedione, etc.), estrogens (e.g., estradiol, estrone, etc.), progesterones, etc.] secretion, improving gonadal function and inducing or stimulating ovulation, as well as a sexual maturation effect, etc., and hence, can be used as agents for improving gonadal function, agents for inducing or stimulating ovulation, gonadotropic hormone secretagogue agents or sex hormone secretagogue agents, or agents for preventing or treating hormone-dependent cancers [e.g., prostate cancer, breast cancer, etc.], infertility [e.g., irregular menstruation, dysmenorrhea, amenorrhea, weight loss-induced amenorrhea, secondary amenorrhea, anovulation, hypoovarianism, hypogonadism, spermatogenetic failure, hypogonadism (e.g., impotence, etc.), genital atrophy, testicular atrophy, testicular function disorder, azoospermia, hypoandrogenemia, etc.], endometriosis, early puberty, myoma of the uterus, etc.

Furthermore, the prodrugs of the metastin derivative (I) or (II) of the present invention or salts thereof are useful as agents for preventing or treating Alzheimer's disease, moderate cognitive impairment, etc.

Moreover, the compounds of the present invention have excellent blood stability, as compared to native metastin such as metastin 54 (1-54) or metastin 10 (45-54).

The metastin derivatives (III) [including the metastin derivatives (II) and the metastin derivatives (I)] of the present invention or their salts or prodrugs are useful as agents for suppressing gonadotropic hormone secretion or sex hormone secretion; down-regulating agents for gonadotropic hormone (e.g., FSH, LH) or sex hormone [e.g., androgen (e.g., testosterone, androstenedione), estrogen (e.g., estradiol, estorone), progesterone];in particular, it is useful for suppressing gonadotropic hormone secretion or sex hormone secretion via down-regulation of gonadotropic hormone or sex hormone (wherein, the down-regulation of gonadotropic hormone or sex hormone may be pulse loss of LHRH or depletion of LHRH) or down-regulation of human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO: 9; as agents for preventing or treating hormone-dependent cancers (e.g., prostate cancer, breast cancer, etc.; particularly, hormone-sensitive prostate cancer, hormone-sensitive breast cancer, etc.); agents for preventing or treating endometriosis; agents for inhibiting ovarian follicular maturation; menstrual cycle-suspending agents; agents for treating myoma of the uterus; agents for treating early puberty; or as contraceptives, etc.

Where the metastin derivative (III) of the present invention [including the metastin derivative (II) and the metastin derivative (I)] or its salt or prodrug, metastin per se, or DNA encoding metastin, etc. have normal agonist activity, an effective dose of the metastin derivative sufficient to suppress the secretion of gonadotropic hormone or sex hormone is administered at the site or tissue where the therapeutic effects are to be exerted, so that the metastin derivative is present in a dose more than required (i.e., the metastin derivative is administered in an excess over the normal effective dose, at which the metastin derivative exerts the effects of suppressing cancer metastasis, suppressing cancer growth, etc.; or the gonadotropic hormone secretagogue agent, the effect of promoting sex hormone secretion, etc.) to exhibit the effects of suppressing gonadotropic hormone secretion or sex hormone secretion. Specific examples include sustained or continuous administration of the normal effective dose (including an administration technique to gradually release the pharmaceutical ingredients by bolus administration); and the like. Further when the metastin derivative (III) of the present invention [including the metastin derivative (II) and the metastin derivative (I)] or its salt or the prodrug thereof, etc. have a sufficient agonist activity more than required (a super-agonist activity), it becomes possible to sustain the activities more than exhibited by the necessary dose at the site or tissue where the therapeutic effect are to be exhibited. It is therefore sufficient even by normal effective dose administration to suppress the secretion of gonadotropic hormone or sex hormone, whereby the effect of suppressing gonadotropic hormone secretion or sex hormone secretion is exhibited.

That is, the metastin derivative (III) [including the metastin derivative (II) and the metastin derivative (I)] or its salt or prodrug, or metastin per se, metastin-encoding DNA, etc. are administered in an effective dose sufficient to suppress the secretion of gonadotropic hormone or sex hormone. Consequently, it becomes possible to keep the metastin derivative, etc. present in a dose more than the necessary dose or sustain the activity more than exhibited by the necessary dose, at the site or tissue where the pharmaceutical effects are to be exhibited, resulting in exerting the effect of suppressing gonadotropic hormone secretion or sex hormone secretion.

The pharmaceutical compositions comprising the compounds of the present invention are low toxic and thus can be safely administered orally or parenterally (e.g., topically, rectally, intravascularly, etc.) either directly as they are or in the form of pharmaceutical preparations such as tablets (including dragees and film-coated tablets), powdery dosage forms, granules, capsules (including soft capsules), liquid dosage forms, injections, suppositories, sustained release dosage forms, etc.

The compound of the present invention is contained in the pharmaceutical preparation of the present invention in about 0.01 to about 100 wt %, based on the total weight of the preparation.

A dose of the compound of the present invention may vary depending upon subject to be administered, target organ, conditions, route of administration, etc., and in oral administration, the compound is generally administered to the patient with cancer (as 60 kg body weight) in a daily dose of about 0.1 to about 100 mg, preferably about 1.0 to about 50 mg and more preferably about 1.0 to about 20 mg. In parenteral administration, a single dose of the compound may vary depending upon subject to be administered, target organ, conditions, route of administration, etc., and in the form of an injectable dosage form, it is advantageous to administer the compound to the patient with cancer (as 60 kg body weight) generally in a daily dose of about 0.01 to about 30 mg, preferably about 0.1 to about 20 mg, and more preferably about 0.1 to about 10 mg. For other animal species, the corresponding dose as converted per 60 kg weight can be administered.

Pharmacologically acceptable carriers, which may be used in manufacturing the pharmaceutical preparation of the present invention, include various organic or inorganic carrier substances conventionally used as materials for pharmaceutical preparations. These substances include, e.g., an excipient, a lubricant, a binder and a disintegrating agent in a solid dosage form, and a solvent, a dissolution aid, a suspending agent, an isotonizing agent, a buffer, a soothing agent, etc. in a liquid dosage form. In addition, conventional additives such as a preservative, an antioxidant, a colorant, a sweetener, an adsorbent, a wetting agent, etc. can be appropriately used in suitable amounts, if necessary.

Examples of excipients include, e.g., lactose, saccharose, D-mannitol, starch, cornstarch, crystalline cellulose, light anhydrous silicic acid, etc.

Examples of useful lubricants include, e.g., magnesium stearate, calcium stearate, talc, colloidal silica, etc.

Examples of binders include, e.g., crystalline cellulose, saccharose, D-mannitol, dextrin, hydroxypropylcellulose, hydroxypropylmethylcellulose, polyvinylpyrrolidone, starch, sucrose, gelatin, methylcellulose, sodium carboxymethylcellulose, etc.

Examples of disintegrating agents include, e.g., starch, carboxymethylcellulose, carboxymethylcellulose calcium, sodium carboxymethyl starch, L-hydroxypropylcellulose, etc.

Examples of solvents include, e.g., water for injection, alcohol, propylene glycol, Macrogol, sesame oil, corn oil, olive oil, etc.

Examples of dissolution aids include, e.g., polyethylene glycol, propylene glycol, D-mannitol, benzyl benzoate, ethanol, trisaminomethane, cholesterol, triethanolamine, sodium carbonate, sodium citrate, etc.

Examples of suspending agents include, e.g., surfactants such as stearyltriethanolamine, sodium laurylsulfate, lauryl aminopropionate, lecithin, benzalkonium chloride, benzethonium chloride, glycerine monostearate, etc.; hydrophilic polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, sodium carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, etc.

Examples of isotonizing agents include, e.g., glucose, D-sorbitol, sodium chloride, glycerine, D-mannitol, etc.

Examples of buffers include, e.g., buffering solutions of a phosphate, acetate, carbonate, citrate, etc.

Examples of soothing agents include, e.g., benzyl alcohol, etc.

Examples of preservatives include, e.g., p-hydroxybenzoates, chlorobutanol, benzyl alcohol, phenethyl alcohol, dehydroacetic acid, sorbic acid, etc.

Examples of antioxidants include, e.g., a sulfite, ascorbic acid, α-tocopherol, etc.

Furthermore, the compound of the present invention can be used in combination with drugs other than the compound of the present invention.

Examples of the drugs, which can be used in combination with the compound of the present invention (hereinafter referred to as a combination drug), include chemotherapeutic agents for treating cancer, hormonal therapeutic agents, immunotherapeutic agents, etc.

Examples of “chemotherapeutic agents” include, e.g., alkylating agents, antimetabolites, anticancer antibiotics, and plant-derived anticancer agents.

Examples of “alkylating agents” include, e.g., nitrogen mustard, nitrogen mustard-N-oxide hydrochloride, chlorambutyl, cyclophosphamide, ifosfamide, thiotepa, carboquone, improsulfan tosylate, busulfan, nimustine hydrochloride, mitobronitol, melphalan, dacarbazine, ranimustine, estramustine sodium phosphate, triethylenemelamine, carmustine, lomustine, streptozocin, pipobroman, etoglucid, carboplatin, cisplatin, miboplatin, nedaplatin, oxaliplatin, altretamine, ambamustine, dibrospidium hydrochloride, fotemustine, prednimustine, pumitepa, ribomustin, temozolomide, treosulphan, trophosphamide, zinostatin stimalamer, carboquone, adozelesin, cystemustine, bizelesin, etc.

Examples of “antimetabolites” include, e.g., mercaptopurine, 6-mercaptopurine riboside, thioinosine, methotrexate, enocitabine, cytarabine, cytarabine ocfosfate, ancitabine hydrochloride, 5-FU drugs (e.g., fluorouracil, tegafur, UFT, doxifluridine, carmofur, gallocitabine, emmitefur, etc.), aminopterin, leucovorin calcium, tabloid, butocine, folinate calcium, levofolinate calcium, cladribine, emitefur, fludarabine, gemcitabine, hydroxycarbamide, pentostatin, piritrexim, idoxuridine, mitoguazone, thiazophrine, ambamustine, etc.

Examples of “anticancer antibiotics” include, e.g., actinomycin D, actinomycin C, mitomycin C, chromomycin A3, bleomycin hydrochloride, bleomycin sulfate, peplomycin sulfate, daunorubicin hydrochloride, doxorubicin hydrochloride, aclarubicin hydrochloride, pirarubicin hydrochloride, epirubicin hydrochloride, neocarzinostatin, mithramycin, sarcomycin, carzinophilin, mitotane, zorubicin hydrochloride, mitoxantrone hydrochloride, idarubicin hydrochloride, etc.

Examples of “plant-derived anticancer agents” include, e.g., etoposide, etoposide phosphate, vinblastine sulfate, vincristine sulfate, vindesine sulfate, teniposide, paclitaxel, docetaxel, vinorelbine, etc.

Examples of “hormonal therapeutic agents” include, e.g., fosfestrol, diethylstylbestrol, chlorotrianisene, medroxyprogesterone acetate, megestrol acetate, chlormadinone acetate, cyproterone acetate, danazol, allylestrenol, gestrinone, mepartricin, raloxifene, ormeloxifene, levormeloxifene, anti-estrogens (e.g., tamoxifen citrate, toremifene citrate, etc.), pill dosage forms, mepitiostane, testrolactone, aminoglutethimide, LH-RH agonists (e.g., goserelin acetate, buserelin, Leuprorelin, etc.), droloxifene, epitiostanol, ethinylestradiol sulfonate, aromatase inhibitors (e.g., fadrozole hydrochloride, anastrozole, retrozole, exemestane, vorozole, formestane, etc.), anti-androgens (e.g., flutamide, bicartamide, nilutamide, etc.), 5α-reductase inhibitors (e.g., finasteride, epristeride, etc.), adrenocorticohormone drugs (e.g., dexamethasone, prednisolone, betamethasone, triamcinolone, etc.), androgen synthesis inhibitors (e.g., abiraterone, etc.), retinoid and drugs that retard retinoid metabolism (e.g., liarozole, etc.), and among them, LH-RH agonists (e.g., goserelin acetate, buserelin, Leuprorelin, etc.) are preferable.

Examples of “immunotherapeutic agents (BRM)” include, e.g., picibanil, krestin, sizofuran, lentinan, ubenimex, interferons, interleukins, macrophage colony-stimulating factor, granulocyte colony-stimulating factor, erythropoietin, lymphotoxin, BCG vaccine, Corynebacterium parvum, levamisole, polysaccharide K, procodazole, etc.

The combined use of the compound of the present invention and a combination drug results in, for example, the following excellent effects.

(1) The dose of the compound of the present invention can be reduced when compared with the dose when administered alone.

(2) A combination drug with the compound of the present invention can be chosen depending on the condition (mild, severe, etc.) of a patient.

(3) A combination drug, whose functional mechanism is different from that of the compound of the present invention, can be chosen so that a treatment period can be set longer.

(4) A combination drug, whose functional mechanism is different from that of the compound of the present invention, can be chosen so that sustained therapeutic effects can be achieved.

(5) A synergistic effect can be obtained by the combined use of the compound of the present invention and a combination drug.

In addition, the compound of the present invention can reduce values of testosterone to emasculate level immediately after medication. Thus when the combination drug such as LH-RH agonist (e.g., goserelin acetate, buserelin, Leuprorelin etc.; preferably Leuprorelin) uses in combination with the compound of the present invention, the values of testosterone can be reduced to emasculate level immediately after medication of the compound of the present invention. Further, since the combined use of the combination drug such as LH-RH agonist (e.g., goserelin acetate, buserelin, Leuprorelin etc.; preferably Leuprorelin) and the compound of the present invention results in prolonged preservation of hormone-dependent period, it can advantageously be used.

Hereinafter, the combined use of Compound (I) of the present invention and a combination drug is referred to as “the combined preparation of the present invention.”

When the combined preparation of the present invention is used, a dosing period of the compound of the present invention and the combination is not restricted; the compound of the present invention or its pharmaceutical composition and a combination drug or its pharmaceutical composition may be administered to the subject to be administered either simultaneously or at certain time intervals. The dose of a combination drug may be modified according to the dose used clinically and may be appropriately chosen depending upon subject to be administered, route for administration, disease, combination, etc.

A mode for administration of the combined preparation of the present invention is not particularly limited, but it is sufficient that the compound of the present invention is used in combination with a combination drug at the time of administration. For such mode of administration, there are, for example, (1) administration of a simple dosage form obtained by mixing the compound of the present invention and a combination drug together at the same time, (2) simultaneous administration of two dosage forms prepared separately from the compound of the present invention and a combination drug through the same route for administration, (3) administration of two dosage forms prepared separately from the compound of the present invention and a combination drug at certain time intervals through the same route for administration, (4) simultaneous administration of two dosage forms prepared separately from the compound of the present invention and a combination drug through different routes for administration, (5) administration of two dosage forms prepared separately from the compound of the present invention and a combination drug at certain time intervals (e.g., administration of the compound of the present invention and a combination drug in this order, or administration in a reversed order) through different routes for administration, etc.

The combined preparation of the present invention is low toxic and thus can be safely administered orally or parenterally (e.g., topically, rectally, intravascularly, etc.) either directly as they are or in the form of pharmaceutical preparations such as tablets (including dragees and film-coated tablets), powdery dosage forms, granules, capsules (including soft capsules), liquid dosage forms, injections, suppositories, sustained release dosage forms, etc., which are obtained by mixing the compound of the present invention or (and) a combination drug described above with pharmacologically acceptable carriers. Injectable dosage forms can be administered intravenously, intramuscularly or subcutaneously, into the organ, or directly at the focus.

Pharmacologically acceptable carriers, which may be used to manufacture the combined preparation of the present invention, include various organic or inorganic carrier substances conventionally used as materials for pharmaceutical preparations. These substances include, e.g., an excipient, a lubricant, a binder and a disintegrating agent in a solid dosage form, and a solvent, a dissolution aid, a suspending agent, an isotonizing agent, a buffer, a soothing agent, etc. in a liquid dosage form. In addition, conventional additives such as a preservative, an antioxidant, a colorant, a sweetener, an adsorbent, a wetting agent, etc. can be appropriately used in suitable amounts, if necessary.

Examples of excipients include, e.g., lactose, saccharose, D-mannitol, starch, cornstarch, crystalline cellulose, light anhydrous silicic acid, etc.

Examples of useful lubricants include, e.g., magnesium stearate, calcium stearate, talc, colloidal silica, etc.

Examples of binders include, e.g., crystalline cellulose, saccharose, D-mannitol, dextrin, hydroxypropylcellulose, hydroxypropylmethylcellulose, polyvinylpyrrolidone, starch, sucrose, gelatin, methylcellulose, sodium carboxymethylcellulose, etc.

Examples of disintegrating agents include, e.g., starch, carboxymethylcellulose, carboxymethylcellulose calcium, sodium carboxymethyl starch, L-hydroxypropylcellulose, etc.

Examples of solvents include, e.g., water for injection, alcohol, propylene glycol, Macrogol, sesame oil, corn oil, olive oil, etc.

Examples of dissolution aids include, e.g., polyethylene glycol, propylene glycol, D-mannitol, benzyl benzoate, ethanol, trisaminomethane, cholesterol, triethanolamine, sodium carbonate, sodium citrate, etc.

Examples of suspending agents include, e.g., surfactants such as stearyltriethanolamine, sodium laurylsulfate, lauryl aminopropionate, lecithin, benzalkonium chloride, benzethonium chloride, glycerine monostearate, etc.; hydrophilic polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, sodium carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, etc.

Examples of isotonizing agents include, e.g., glucose, D-sorbitol, sodium chloride, glycerine, D-mannitol, etc.

Examples of buffers include, e.g., buffering solutions of a phosphate, acetate, carbonate, citrate, etc.

Examples of soothing agents include, e.g., benzyl alcohol, etc.

Examples of preservatives include, e.g., p-hydroxybenzoates, chlorobutanol, benzyl alcohol, phenethyl alcohol, dehydroacetic acid, sorbic acid, etc.

Examples of antioxidants include, e.g., a sulfite, ascorbic acid, α-tocopherol, etc.

In the combined preparation of the present invention, a ratio of the compound of the present invention to a combination drug may be appropriately chosen depending upon subject to be administered, route for administration, disease, combination, etc.

For example, the amount of the compound of the present invention contained in the combined preparation of the present invention varies depending on the dosage form of the preparation, but is usually about 0.01 to 100% by weight, preferably about 0.1 to 50% by weight, and more preferably about 0.5 to 20% by weight, based on the total weight of the preparation.

The amount of a combination drug contained in the combined preparation of the present invention varies depending on the dosage form of the preparation, but is usually about 0.01 to 100% by weight, preferably about 0.1 to 50% by weight, and more preferably about 0.5 to 20% by weight, based on the total weight of the preparation.

The amount of additives such as a carrier, etc. contained in the combined preparation of the present invention varies depending on the dosage form of the preparation, and is usually about 1 to 99.99% by weight, preferably about 10 to 90% by weight, based on the total weight of the preparation.

These amounts may be the same, also when the compound of the present invention and a combination drug are separately prepared, respectively.

These preparations can be manufactured by per se publicly known methods generally used conventionally.

For example, an injectable dosage form can be prepared by dissolving, suspending or emulsifying the compound of the present invention or a combination drug in a dispersing agent (e.g., Tween 80 (manufactured by Atlas Powder Company, USA), HCO 60 (manufactured by Nikko Chemicals Co., Ltd.), polyethylene glycol, carboxymethyl cellulose, sodium alginate, etc.), a stabilizer (e.g., ascorbic acid, sodium pyrosulfite), a surfactant (e.g., polysorbate 80, macrogol, etc.), a solubilizing agent (e.g., glycerin, ethanol, etc.), a buffering agent (e.g., phosphoric acid or its alkali metal salt, citric acid or its alkali metal salt, etc.), an isotonizing agent (e.g., sodium chloride, potassium chloride, mannitol, sorbitol, glucose, etc.), a pH adjusting agent (e.g., hydrochloric acid, sodium hydroxide, etc.), a preservative (e.g., ethyl p-oxybenzoate, benzoic acid, methylparabene, propylparabene, benzyl alcohol, etc.), a solubilizer (e.g., concentrated glycerin, meglumine, etc.), a dissolution aid (e.g., propylene glycol, saccharose, etc.), a soothing agent (e.g., glucose, benzyl alcohol, etc.), a vegetable oil such as olive oil, sesame oil, cottonseed oil, corn oil, etc., a dissolution aid such as propylene glycol or the like to prepare into an oily injection.

An oral dosage form can be produced in a conventional manner by adding to the compound of the present invention or a combination drug, for example, an excipient (e.g., lactose, saccharose, starch, etc.), a disintegrating agent (e.g., starch, calcium carbonate, etc.), a binder (e.g., starch, gum arabic, carboxymethyl cellulose, polyvinylpyrrolidone, hydroxypropyl cellulose, etc.), a lubricant (e.g., talc, magnesium stearate, polyethylene glycol 6000, etc.) and other additives, compressing the resulting mixture and, if necessary, coating the compressed product for the purpose of taste masking, enteric degradation or sustained release by techniques per se publicly known. Coating agents for this purpose include, for example, hydroxypropylmethyl cellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, polyoxyethylene glycol, Tween 80, Prulonic F68, cellulose acetate phthalate, hydroxypropylmethyl cellulose phthalate, hydroxymethyl cellulose acetate succinate, Eudragit (manufactured by Rohm Company, Germany, methacrylic acid/acrylic acid copolymer) and dyes (e.g., iron oxide, titanium dioxide). The oral dosage form may be either a rapid release dosage form or a sustained release dosage form.

For example, in a suppository, the compound of the present invention or a combination drug is prepared into an oily or aqueous solid, semi-solid or liquid composition by techniques per se publicly known. Oily bases used for the composition described above include glycerides of higher fatty acids [e.g., cacao butter, uitepsols (manufactured by Dynamite Nobel Company, Germany), etc.], moderate fatty acids [e.g., miglyols (manufactured by Dynamite Nobel Company, Germany), etc.], vegetable oils (e.g., sesame oil, soybean oil, cottonseed oil, etc.), and the like. Aqueous bases include, for example, polyethylene glycols and propylene glycol. Bases for aqueous gels include, for example, natural rubbers, cellulose derivatives, vinyl polymers, acrylic polymers, etc.

Examples of the sustained release dosage form above include sustained release microcapsules, and the like.

Sustained release microcapsules can be obtained by per se publicly known methods, and are preferably prepared in the form of, e.g., a sustained release dosage form by the method [2] shown below and administered.

Preferably, the compound of the present invention is prepared into a dosage form for oral administration such as a solid dosage form (e.g., powdery dosage form, granules, tablets, capsules) or into a dosage form for rectal administration such as a suppository, etc. A dosage form for oral administration is particularly preferred.

A combination drug can be prepared into the dosage form described above, depending on the kind of drug.

Hereinafter, [1] an injectable preparation of the compound of the present invention or a combination drug and its production, [2] a sustained release or immediate release preparation of the compound of the present invention or a combination drug and its production and [3] a sublingual, buccal or rapid oral disintegrating preparations of the compound of the present invention or a combination drug and its production will be specifically described.

[1] Injectable Preparation and its Production

An injectable preparation obtained by dissolving the compound of the present invention or a combination drug in water is preferred. The injectable preparation may contain a benzoate and/or a salicylate.

The injectable preparation is obtained by dissolving the compound of the present invention or a combination drug and optionally a benzoate and/or a salicylate in water.

Examples of the benzoate and/or salicylate described above include an alkali metal salt such as sodium and potassium salts, etc., an alkaline earth metal salt such as calcium and magnesium salts, etc., an ammonium salt, a meglumine salt, a salt of an organic acid such as trometamol, and the like.

The concentration of the compound of the present invention or a combination drug in the injectable preparation is about 0.5 to 50 w/v %, preferably about 3 to 20 w/v %. The concentration of the benzoate and/or salicylate is 0.5 to 50 w/v %, preferably 3 to 20 w/v %.

Furthermore, additives generally used in an injectable preparation such as a stabilizer (ascorbic acid, sodium pyrosulfite, etc.), a surfactant (polysorbate 80, macrogol, etc.), a solubilizing agent (glycerin, ethanol, etc.), a buffering agent (phosphoric acid and its alkali metal salt, citric acid and its alkali metal salt, etc.), an isotonizing agent (sodium chloride, potassium chloride, etc.), a dispersing agent (hydroxypropylmethyl cellulose, dextrin), a pH adjusting agent (hydrochloric acid, sodium hydroxide, etc.), a preservative (ethyl p-oxybenzoate, benzoic acid, etc.), a solubilizer (concentrated glycerin, meglumine, etc.), a dissolution aid (propylene glycol, saccharose, etc.), a soothing agent (glucose, benzyl alcohol, etc.) are appropriately added to the preparation. Any of these additives is added in an amount generally used in an injectable preparation.

The injectable preparation is adjusted to pH of 2 to 12, preferably 2.5 to 8.0 by adding a pH adjusting agent.

The injectable preparation is obtained by dissolving both the compound of the present invention or a combination drug and optionally a benzoate and/or salicylate, and, if necessary, the above additives in water. These components may be dissolved in any order according to the same manner as in a conventional injectable preparation.

An aqueous solution for injection is preferably warmed, and used as an injectable preparation after filtration sterilization by filtration or autoclaved as in a conventional injectable preparation to provide for an injectable preparation.

An aqueous injectable preparation is preferably autoclaved, e.g., at 100 to 121° C. for 5 to 30 minutes.

Moreover, the preparation may be in a solution form to which antibacterial activity is imparted to be usable as a multiple dosage form in divided dosing.

[2] Sustained Release or Immediate Release Preparation and its Production

A preferred sustained release preparation comprises a core comprising the compound of the present invention or a combination drug, which is optionally coated with a water-insoluble material or a swelling polymer. For example, a sustained release preparation for oral administration of a once-daily dosage form is preferred.

Examples of the water-insoluble material used for the coating agent include cellulose ethers such as ethyl cellulose, butyl cellulose, etc., cellulose esters such as cellulose acetate, cellulose propionate, etc., polyvinyl esters such as polyvinyl acetate, polyvinyl butyrate, etc., acrylic acid polymers such as an acrylic acid/methacrylic acid copolymer, a methyl methacrylate copolymer, an ethoxyethyl methacrylate/cinnamoethyl methacrylate/aminoalkyl methacrylate copolymer, a polyacrylic acid, a polymethacrylic acid, a methacrylic acid alkylamide copolymer, a poly(methyl methacrylate), a polymethacrylate, an aminoalkyl methacrylate copolymer, a poly(methacrylic anhydride), a glycidyl methacrylate copolymer, in particular, a series of Eudragits (Rohm & Pharma) such as Eudragit RS-100, RL-100, RS-30D, RL-30D, RL-PO, RS-PO (ethyl acrylate/methyl methacrylate/chlorotrimethyl methacrylate/ethyl ammonium copolymer) and Eudragit NE-30D (methyl methacrylate/ethyl acrylate copolymer), etc., hydrogenated oils such as hydrogenated castor oil (e.g., LUBRI WAX (Freund Industrial Co., Ltd.), etc.), waxes such as carnauba wax, a fatty acid glycerin ester, paraffin, etc., polyglycerin fatty acid esters, etc.

The swelling polymer is preferably a polymer having an acidic removable group and exhibiting pH-dependent swelling, and a polymer having an acidic removable group, which undergoes a less swelling at an acidic pH such as in the stomach but is swollen extensively at a neutral pH such as in the small and large intestines, is preferred.

Examples of such a polymer having an acidic removable group and exhibiting pH-dependent swelling include a crosslinked polyacrylic acid polymer such as Carbomers 934P, 940, 941, 974P, 980, 1342, etc., polycarbophil and calcium polycarbophil (all manufactured by BF Goodrich Chemicals), Hivis Wakos 103, 104, 105 and 304 (all manufactured by Wako Pure Chemical Industries, Ltd.), etc.

The coating agent used in the sustained release preparation may further contain a hydrophilic material.

Examples of the hydrophilic material include a polysaccharide which may have a sulfate group, such as pullulan, dextrin, alkali metal alginates, etc., a polysaccharide having a hydroxyalkyl group or a carboxyalkyl group such as hydroxypropyl cellulose, hydroxypropylmethyl cellulose, sodium carboxymethylcellulose, etc., methyl cellulose, polyvinyl pyrrolidone, polyvinyl alcohol, polyethylene glycol, etc.

The amount of the water-insoluble material contained in the coating agent of the sustained release preparation is about 30 to about 90% (w/w), preferably about 35 to about 80% (w/w), more preferably about 40 to about 75% (w/w), and the swelling polymer content is about 3 to about 30% (w/w), preferably about 3 to about 15% (w/w). The coating agent may further contain a hydrophilic material, and the amount of the hydrophilic material contained in the coating agent is about 50% (w/w) or less, preferably about 5 to about 40% (w/w), more preferably about 5 to about 35% (w/w). As used herein, the % (w/w) above is used to mean a % by weight based on the coating agent composition, which is the remainder of the coating agent solution after removing any solvent (e.g., water, a lower alcohol such as methanol, ethanol, etc.).

The sustained release preparation is manufactured by preparing a core containing a drug as illustrated below, followed by coating the resulting core with a coating agent solution obtained by heat-melting a water-insoluble material or a swelling polymer or by dissolving or dispersing such a material in a solvent.

I. Preparation of Drug-Containing Core

The shape of a core containing a drug to be coated with a coating agent (hereinafter sometimes simply referred to as a core) is not specifically limited but preferably prepared into a particulate shape such as granules, fine granules, or the like.

When the core is granules or fine granules, they have a mean particle size of preferably about 150 to about 2,000 μm, more preferably about 500 to about 1,400 μm.

The core can be prepared in a conventional manner. For example, a drug is mixed with a suitable excipient, binder, disintegrating agent, lubricant, stabilizer, etc., and then subjected to wet extrusion granulation, fluidized bed granulation, or the like.

The drug content in the core is about 0.5 to about 95% (w/w), preferably about 5.0 to about 80% (w/w), more preferably about 30 to about 70% (w/w).

Examples of the excipient contained in the core include a saccharide such assaccharose, lactose, mannitol, glucose, etc., starch, crystalline cellulose, calcium phosphate, cornstarch, etc. Among them, crystalline cellulose and cornstarch are preferred.

Examples of the binder used include polyvinyl alcohol, hydroxypropyl cellulose, polyethylene glycol, polyvinyl pyrrolidone, Pluronic F68, gum arabic, gelatin, starch, etc. Examples of the disintegrating agent include calcium carboxymethyl cellulose (ECG505), sodium croscarmellose (Ac-Di-Sol), crosslinked polyvinyl pyrrolidone (crospovidone), a low substituted hydroxypropyl cellulose (L-HPC), etc. Among them, hydroxypropyl cellulose, polyvinyl pyrrolidone and a low substituted hydroxypropyl cellulose are preferred. Examples of the lubricant and the anticoagulant include talc, magnesium stearate and its inorganic salts, and examples of the lubricant include polyethylene glycol, etc. Examples of the stabilizer include an acid such as tartaric acid, citric acid, succinic acid, fumaric acid, maleic acid, etc.

In addition to the technique described above, the core can be prepared by using other techniques such as an tumbling granulation technique, a pan coating technique, a fluidized bed coating technique and a melt granulation technique, wherein a drug or a mixture of the drug with an excipient, a lubricant, etc. is portionwise added to inert carrier particles as seeds for the core with spraying a binder dissolved in a suitable solvent such as water, a lower alcohol (e.g., methanol, ethanol, etc.) or the like. Examples of the inert carrier particles include those prepared fromsaccharose, lactose, starch, crystalline cellulose and waxes, and, preferably, these carriers have a mean particle size of about 100 μm to about 1,500 μm.

In order to separate the drug contained in the core from a coating agent, the surface of the core may be covered with a protective material. Examples of the protective material include the hydrophilic material described above and water-insoluble material. The preferred protective material is polyethylene glycol or a polysaccharide having a hydroxyalkyl group or a carboxyalkyl group, more preferably, hydroxypropylmethyl cellulose and hydroxypropyl cellulose. The protective material may contain, as a stabilizer, an acid such as tartaric acid, citric acid, succinic acid, fumaric acid, maleic acid, etc., and a lubricant such as talc. When the protective material is used, the amount thereof to be coated is about 1 to about 15% (w/w), preferably about 1 to about 10% (w/w), more preferably about 2 to about 8% (w/w) based on the core.

The protective material can be coated by a conventional coating method and specifically, the core is spray-coated with the protective material by a fluidized bed coating technique, a pan coating technique, etc.

II. Coating of Core with Coating Agent

The core obtained in I above is coated with a coating agent solution prepared by melt-heating the water-insoluble material and pH-dependent swelling polymer described above and a hydrophilic material or by dissolving or dispersing them in a solvent to obtain a sustained release preparation.

As a coating method of the core with the coating agent solution, there are, for example, spray-coating, etc.

The composition ratio of the water-insoluble material, swelling polymer and hydrophilic material in the coating agent solution can be appropriately chosen to be within the amounts of the respective components contained in the coating.

The amount of the coating agent is about 1 to about 90% (w/w), preferably about 5 to about 50% (w/w), more preferably about 5 to about 35% (w/w) based on the core (excluding the protective material coating).

As the solvent for the coating agent solution, water and an organic solvent can be used alone or as a mixture thereof. When a mixture is used, the ratio of water and the organic solvent (water/organic solvent: a weight ratio) may vary with the range of 1 to 100%, and is preferably 1 to about 30%. The organic solvent is not particularly limited so far as it can dissolve the water-insoluble material, and examples of the solvent include a lower alcohol such as methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butyl alcohol, etc., a lower alkanone such as acetone, acetonitrile, chloroform, methylene chloride, etc. Among them, a lower alcohol is preferred, with ethyl alcohol and isopropyl alcohol being more preferred. Water and a mixture of water and an organic solvent are used preferably as solvents for the coating agent solution. In this case, an acid such as tartaric acid, citric acid, succinic acid, fumaric acid, maleic acid, etc. may be added to the coating agent solution, if necessary, for the purpose of stabilizing the coating agent solution.

To carry out the coating by spray coating, the coating can be made using a conventional coating method. Specifically, the core is sprayed with a coating agent solution by a fluidized bed coating technique, a pan coating technique, or the like. At this time, a lubricant such as talc, titanium oxide, magnesium stearate, calcium stearate, light silicic anhydride, etc., and a plasticizer such as glycerin fatty ester, hardened castor oil, triethyl citrate, cetyl alcohol, stearyl alcohol, etc. may also be added.

After coating with a coating agent, an antistatic agent such as talc may also be admixed, if necessary.

The immediate release preparation may be a liquid (solution, suspension, emulsion, etc.) or a solid (particles, pills, tablets, etc.). An oral preparation and a parenteral preparation such as an injectable preparation may be used, and an oral preparation is preferred.

The immediate release preparation may usually contain a carrier, additives and an excipient (hereinafter sometimes abbreviated as excipients) which are conventionally used in the pharmaceutical field, in addition to a drug which is an active ingredient. The pharmaceutical excipients are not specifically limited so long as they are excipients conventionally used in the pharmaceutical field. Examples of the excipient for an oral solid preparation include lactose, starch, corn starch, crystalline cellulose (Avicel PH101, manufactured by Asahi Kasei Corporation, etc.), powdered sugar, granulated sugar, mannitol, light silicic anhydride, magnesium carbonate, calcium carbonate, L-cysteine, etc., with corn starch and mannitol being preferred. Any of these excipients may be employed alone or in combination with each other. The amounts of the excipients are, for example, about 4.5 to about 99.4 w/w %, preferably about 20 to about 98.5 w/w %, more preferably about 30 to about 97 w/w %, based on the total weight of the immediate release preparation.

The content of drug in the immediate release preparation may appropriately be selected from about 0.5% through about 95%, preferably about 1% through about 60% to whole amount of the immediate release preparation.

When the immediate release preparation is an oral solid preparation, the preparation contains a disintegrating agent in addition to the components described above. Examples of the disintegrating agent include calcium carboxymethylcellulose (ECG505 manufactured by GOTOKU CHEMICAL Co., Ltd.), sodium-croscarmellose (for example, Ac-Di-Sol manufactured by Asahi Kasei Corporation), crospovidone (for example, COLIDON CL manufactured by BASF), low-substituted hydroxypropyl cellulose (Shin-Etsu chemical Co., Ltd.), carboxymethyl starch (MATSUTANI CHEMICAL INDUSTRY Co., Ltd.), sodium carboxymethyl starch (EXORITAB manufactured by KIMURA SANGYO), partial α starch (PCS manufactured by Asahi Kasei Corporation), etc. For example, the disintegrating agent that disintegrates granules by water absorption or swelling upon contact with water, or forming a channel between the active component comprising the core and an excipient can be used. Any of these disintegrating agents can be used alone or in combination with each other. The amount of the disintegrating agent used may be appropriately chosen depending upon the type and the amount of the drug used or a particular preparation design for the intended release performance. For example, the amount is about 0.05 to about 30 w/w %, preferably about 0.5 to about 15 w/w % based on the total weight of the immediate release preparation.

When the immediate release preparation is an oral solid preparation, the preparation may optionally contain additives conventionally used in a solid preparation, in addition to the components described above. Examples of the additives include binders (for example, sucrose, gelatin, powdery gum arabic, methyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, carboxymethylcellulose, polyvinyl pyrrolidone, pullran, dextrin, etc.), lubricants (polyethylene glycol, magnesium stearate, talc, light silicic anhydride (for example, aerosil (NIPPON AEROSIL)), surfactants (for example, anionic surfactants such as sodium alkylsulfate, nonionic surfactants such as polyoxyethylene fatty ester, polyoxyethylene sorbitan fatty ester, polyoxyethylene castor oil derivatives, etc.), colorants (for example, tar colorants, caramel, colcothar, titanium oxide, riboflavins), if necessary, corrigents (for example, sweeteners, flavors, etc.), adsorbents, preservatives, wetting agents, antistatic agents, etc. Furthermore, an organic acid such as tartaric acid, citric acid, succinic acid, fumaric acid or the like can also be added as a stabilizer.

As the binder above, hydroxypropyl cellulose, polyethylene glycol and polyvinyl pyrrolidone, etc. are preferably used.

The immediate release preparation can be prepared by mixing the components described above and kneading the mixture, if necessary, and then molding according to a conventional technique for making pharmaceutical preparations. The mixing above can be carried out in a conventional manner, e.g., by mixing, kneading, etc. Specifically, where the immediate release preparation is in the form of particles, the preparation can be prepared by mixing components with a vertical granulator, a multi-purpose kneader (HATA IRON WORKS CO., LTD), a fluidized bed granulator FD-5S(POWREX CORPORATION) or thee like, and then granulating the resulting by wet extrusion granulation or fluidized bed granulation by a technique similar to that for preparing the core of the sustained release preparation described above.

The immediate release preparation and the sustained release preparation thus obtained can be compounded, as they are, or, together with appropriate pharmaceutical excipients, in pharmaceutical preparations separately in a conventional manner to prepare respective preparations for administering in combination with each other simultaneously or at certain time intervals. Alternatively, both preparations may be compounded in a single dosage form for oral administration (e.g., granules, fine granules, tablets, capsules) as they are, or, together with appropriate pharmaceutical excipients. Both preparations in the form of granules or fine granules may also be filled in a single capsule for oral administration.

[3] Sublingual, Buccal or Rapid Oral Disintegrating Preparation and Its Production

A sublingual, buccal or rapid oral disintegrating preparation may be in the form of a solid preparation such as a tablet, or may be in the form of an oral mucosal patch (film).

The sublingual, buccal or rapid oral disintegrating preparation is preferably a preparation containing the compound of the present invention or a combination drug and an excipient. The preparation may also contain auxiliary agents such as a lubricant, an isotonizing agent, a hydrophilic carrier, a water-dispersible polymer, a stabilizer, etc. Further for the purpose of promoting the absorption and enhancing the bioavailability, the preparation may also contain β-cyclodextrin or β-cyclodextrin derivatives (e.g., hydroxypropyl-β-cyclodextrin, etc.).

Examples of the above excipient include lactose, saccharose, D-mannitol, starch, crystalline cellulose, light silicic anhydride, etc. Examples of the lubricant include magnesium stearate, calcium stearate, talc, colloidal silica, etc., with magnesium stearate and colloidal silica being preferred. Examples of the isotonizing agent include sodium chloride, glucose, fructose, mannitol, sorbitol, lactose, saccharose, glycerin and urea, with mannitol being particularly preferred. As the hydrophilic carrier, there are, for example, a swelling hydrophilic carrier such as crystalline cellulose, ethyl cellulose, crosslinked polyvinyl pyrrolidone, light silicic anhydride, silicic acid, dicalcium phosphate, calcium carbonate, etc., with crystalline cellulose (e.g., microcrystalline cellulose, etc.) being preferred. As the water-dispersible polymer, there are, for example, a gum (e.g., tragacanth gum, acacia gum, guar gum), alginate (e.g., sodium alginate), cellulose derivatives (e.g., methyl cellulose, carboxymethylcellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose), gelatin, water-soluble starch, polyacrylic acid (e.g., carbomer), polymethacrylic acid, polyvinyl alcohol, polyethylene glycol, polyvinyl pyrrolidone, polycarbophil, ascorbate palmitate salt, etc., with hydroxypropylmethyl cellulose, polyacrylic acid, alginate, gelatin, carboxymethylcellulose, polyvinyl pyrrolidone and polyethylene glycol being preferred. Hydroxypropylmethyl cellulose is particularly preferred. As the stabilizer, there are, for example, cysteine, thiosorbitol, tartaric acid, citric acid, sodium carbonate, ascorbic acid, glycine, sodium sulfite, etc., with citric acid and ascorbic acid being particularly preferred.

The sublingual, buccal or rapid oral disintegrating preparation can be prepared by mixing the compound of the present invention or a combination drug and an excipient by a method per se known. Furthermore, if desired, the auxiliary agents described above, such as the lubricant, isotonizing agent, hydrophilic carrier, water-dispersible polymer, stabilizer, colorant, sweetener, preservative, etc. may also be admixed. After mixing the components described above simultaneously or at certain time intervals, the mixture is compressed into tablets to obtain the sublingual, buccal or oral quick disintegration tablet. In order to obtain a suitable hardness, a solvent such as water, an alcohol, etc. can be used to moisturize or wet the components before or after tabletting, followed by drying.

In preparing the oral mucosal patch (film), the compound of the present invention or a combination drug and the water-dispersible polymer (preferably, hydroxypropyl cellulose, hydroxypropylmethyl cellulose), excipient, etc. described above are dissolved in a solvent such as water, etc. and then the resulting solution is cast into a film. In addition, additives such as a plasticizer, a stabilizer, an antioxidant, a preservative, a colorant, a buffering agent, a sweeteners, etc. may be added to the preparation. A glycol such as polyethylene glycol, propylene glycol, etc. may be added to impart an appropriate elasticity to a film, and a bioadhesive polymer (e.g., polycarbophile, carbopol) may also be added to enhance the adhesion of the film to the oral mucosal lining. The casting can be carried out by pouring a solution onto a non-adhesive surface, spreading the solution using a coater such as a doctor blade in a uniform thickness (preferably, approximately 10 to 1000 microns), and then drying the solution to form a film. The film thus formed is dried at room temperature or while warming, and then cut into pieces each having a desired surface area.

A preferred rapid oral disintegrating preparation is, for example, a rapid diffusion preparation in a solid network form, which comprises the compound of the present invention or a combination drug and a water-soluble or water-diffusible carrier inert to the compound of the present invention or the combination drug. The network is formed by sublimating a solvent from a solid composition comprising a solution of the compound of the present invention or a combination drug in a suitable solvent.

In addition to the compound of the present invention or a combination drug, the composition of the rapid oral disintegrating preparation may preferably contain a matrix-forming agent and a secondary component.

Examples of the matrix-forming agent include gelatins, dextrins and animal or vegetable proteins from soybean, wheat, psyllium seed, etc.; gummy materials such as gum arabic, guar gum, agar, xanthane gum, etc.; polysaccharides; alginates; carboxymethylcelluloses; carrageenans; dextrans; pectins; synthetic polymers such as polyvinyl pyrrolidones; materials derived from gelatin-gum arabic complexes, etc. The matrix-forming agent further includes saccharides such as mannitol, dextrose, lactose, galactose, trehalose, etc.; cyclic saccharides such as cyclodextrins, etc.; inorganic salts such as sodium phosphate, sodium chloride, aluminum silicate, etc.; amino acids having 2 to 12 carbon atoms such as glycine, L-alanine, L-aspartic acid, L-glutamic acid, L-hydroxyproline, L-isoleucine, L-leucine, L-phenylalanine, etc.

One or more matrix-forming agents can be incorporated into a solution or suspension before solidification. The matrix-forming agents may be present in addition to a surfactant, or may be present in the absence of a surfactant. The matrix-forming agents serve not only to form a matrix itself, but also assist to maintain diffusion of the compound of the present invention or a combination drug in the solution or suspension.

The composition may contain a secondary component such as a preservative, an antioxidant, a surfactant, a thickening agent, a colorant, pH adjusting agent, a flavor, a sweetener, a taste masking agent, etc. As the suitable colorant, there are, for example, iron oxide red, black and yellow, FD & C dyes available from ERIS & EVERALD such as FD & C Blue No. 2 and FD & C Red No. 40, etc. Examples of the suitable flavor include mint, raspberry, licorice, orange, lemon, grape fruit, caramel, vanilla, cherry, grape flavor and a combination thereof. Examples of the suitable pH adjusting agent include citric acid, tartaric acid, phosphoric acid, hydrochloric acid and maleic acid. Examples of the suitable sweetener include aspartame, acesulfame K and thaumatine. Examples of the suitable taste masking agent include sodium bicarbonate, ion exchange resins, cyclodextrin inclusion compounds, adsorbents and microencapsulated apomorphine.

The preparation generally contains the compound of the present invention or a combination drug in an amount of about 0.1 to about 50% by weight, preferably about 0.1 to about 30% by weight and, preferably, the preparation (the sublingual tablet, buccal, etc. described above) allows 90% or more of the compound of the present invention or a combination drug to be dissolved (in water) within a time period of about 1 to about 60 minutes, preferably about 1 minute to about 15 minutes, more preferably about 2 minutes to about 5 minutes, or is a rapid oral disintegrating preparation which disintegrates within about 1 to about 60 seconds, preferably about 1 to about 30 seconds, more preferably about 1 to about 10 seconds, after being placed in the oral cavity.

The amount of the above excipient is about 10 to about 99% by weight, preferably about 30 to about 90% by weight based on the total weight of the preparation. The amount of β-cyclodextrin or β-cyclodextrin derivative is about 0 to about 30% by weight based on the total weight of the preparation. The amount of the lubricant is about 0.01 to about 10% by weight, preferably about 1 to about 5% by weight based on the total weight of the preparation. The amount of the isotonizing agent is about 0.1 to about 90% by weight, preferably about 10 to about 70% by weight based on the total weight of the preparation. The amount of the hydrophilic carrier is about 0.1 to about 50% by weight, preferably about 10 to about 30% by weight based on the total weight of the preparation. The amount of the water-dispersible polymer is about 0.1 to about 30% by weight, preferably about 10 to about 25% by weight based on the total weight of the preparation. The amount of the stabilizer is about 0.1 to about 10% by weight, preferably about 1 to about 5% by weight based on the total weight of the preparation. If necessary, the preparation described above may further contain additives such as a colorant, a sweetener, a preservative, etc.

A dose of the combined preparations of the present invention varies depending upon kind of the compound of the present invention, age, body weight, conditions, dosage form, route for administration, dosing period, etc.

A dose of the compound of the present invention may vary depending upon subject to be administered, target organ, conditions, route of administration, etc., and in oral administration, the compound is generally administered to the patient with cancer (as 60 kg body weight) in a daily dose of about 0.1 to about 100 mg, preferably about 1.0 to about 50 mg and more preferably about 1.0 to about 20 mg. In parenteral administration, a single dose of the compound may vary depending upon subject to be administered, target organ, conditions, route of administration, etc., and in the form of an injectable dosage form, it is advantageous to administer the compound to the patient with cancer (as 60 kg body weight) generally in a daily dose of about 0.01 to about 30 mg, preferably about 0.1 to about 20 mg, and more preferably about 0.1 to about 10 mg. For other animal species, the corresponding dose as converted per 60 kg weight can be administered. Of course, the dose may vary depending on individual conditions as described above; in such a case, a dose less than the dose given above may be sufficient, or may be higher than the range above.

It is possible to set any range of a dose for the combination drug, so long as it causes no adverse side effects. A daily dose of the combination drug may vary depending on the severity of disease, subject's age, sex, body weight and susceptibility, the dosing period and intervals, the characteristics, formulation, type and active components of the pharmaceutical preparation, etc. and is not particularly limited. For example, in oral administration, the dose is about 0.001 to 2000 mg, preferably about 0.01 to 500 mg, and more preferably about 0.1 to 100 mg in terms of a drug; usually, this dose is administered by dividing 1 to 4 times per day.

When the pharmaceutical preparations of the present invention are administered, the compound of the present invention and a combination drug may be administered at the same time. Alternatively, a combination drug is first administered and then the compound of the present invention is administered, or the compound of the present invention is first administered and then a combination drug is administered. When they are administered at certain time intervals, the intervals vary depending on the active component to be administered, dosage form and route of administration; when a combination drug is first administered, the compound of the present invention may be administered within 1 minute to 3 days, preferably 10 minutes to 1 day, more preferably 15 minutes to 1 hour after the administration of the combination drug. When the compound of the present invention is first administered, a combination drug may be administered within 1 minute to 1 day, preferably 10 minutes to 6 hours, more preferably 15 minutes to 1 hour after the administration of the compound of the present invention.

As a preferred method of administration, for example, about 0.001 to 200 mg/kg of a combination drug in the form of an oral dosage preparation is administered orally and, after about 15 minutes, about 0.005 to 0.5 mg/kg of the compound of the present invention in the form of a parenteral preparation is administered parenterally as a daily dose.

As the metastins, there are used, for example, human metastin described in WO 00/24890, mouse or rat metastin described in WO 01/75104, etc.

Specific examples of human metastin include a peptide containing the N-terminal 47-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 and consisting of 8 to 54 amino acid residues, and the like.

The “peptide containing the N-terminal 47-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 and consisting of 8 to 54 amino acid residues” may be any peptide, as far as it is a peptide containing the N-terminal 47-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 and consisting of 8 to 54 amino acid residues, but means that these peptides have substantially the same physiological activity (e.g., a receptor binding activity, a signal transduction action, a sugar level elevating action, a pancreatic glucagon secretion promoting action, a urine formation promoting action, etc.). Specifically, there are used (i) a peptide having the amino acid sequence represented by SEQ ID NO: 1, (ii) a peptide having the N-terminal 47-54 amino acid sequence at the C terminus in the amino acid sequence represented by SEQ ID NO: 1 and consisting of 8 to 54 amino acid residues, etc.

More specifically, human metastin used includes (i) a peptide consisting of the amino acid sequence represented by SEQ ID NO: 1 (human metastin 54 (1-54)), (ii) a peptide consisting of the N-terminal 40-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 (human metastin 15 (40-54); SEQ ID NO: 15),

(iii) a peptide consisting of the N-terminal 45-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 (human metastin 10 (45-54); SEQ ID NO: 16),

(iv) a peptide consisting of the N-terminal 46-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 (human metastin 9 (46-54); SEQ ID NO: 17),

(v) a peptide consisting of the N-terminal 47-54 amino acid sequence in the amino acid sequence represented by (human metastin 8 (47-54); SEQ ID NO: 18), etc.

As mouse metastin (A), there are used, for example, (i) a peptide containing the N-terminal 134-141 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 3 and consisting of 8 to 52 amino acid residues. Specific examples of mouse metastin (A) used include (i) a peptide consisting of the N-terminal 90-141 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 3, (ii) a peptide consisting of the N-terminal 132-141 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 3, (iii) a peptide consisting of the N-terminal 127-141 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 3, and the like.

As mouse metastin (B), there are used, for example, (i) a peptide containing the N-terminal 138-145 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 5 and consisting of 8 to 52 amino acid residues. Specific examples of mouse metastin (B) used include (i) a peptide consisting of the N-terminal 94-145 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 5, and the like.

As rat metastin, there are used, for example, (i) a peptide containing the N-terminal 112-119 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 7 and consisting of 8 to 52 amino acid residues. Specific examples of rat metastin used include (i) a peptide consisting of the N-terminal 68-119 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 7, (ii) a peptide consisting of the N-terminal 110-119 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 7, (iii) a peptide consisting of the N-terminal 105-119 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 7, and the like.

Throughout the specification, the metastins are represented in accordance with the conventional way of describing peptides, that is, the N-terminus (amino terminus) at the left hand and the C-terminus (carboxyl terminus) at the right hand. In the peptide represented by SEQ ID NO: 1, the C-terminus may be in any form of a carboxyl group (—COOH), a carboxylate (—COO—), an amide (—CONH₂) and an ester (—COOR). Herein, examples of the ester group shown by R include a C₁₋₆ alkyl group such as methyl, ethyl, n-propyl, isopropyl, n-butyl, etc.; a C₃₋₈ cycloalkyl group such as cyclopentyl, cyclohexyl, etc.; a C₆₋₁₂ aryl group such as phenyl, α-naphthyl, etc.; a C₇₋₁₄ aralkyl such as a phenyl-C₁₋₂ alkyl group, e.g., benzyl, phenethyl, etc.; an α-naphthyl-C₁₋₂ alkyl group such as α-naphthylmethyl, etc.; pivaloyloxymethyl group, which are widely used as an ester for oral use, and the like.

Furthermore, the metastins include peptides, wherein the amino group at the N-terminal methionine residue is protected with a protecting group (e.g., a C₁₋₆ acyl group such as a C₂₋₆ alkanoyl group, e.g., formyl group, acetyl group, etc.); those wherein the N-terminal region is cleaved in vivo and the glutamyl group thus formed is pyroglutaminated; those wherein a substituent (e.g., —OH, —SH, amino group, imidazole group, indole group, guanidino group, etc.) on the side chain of an amino acid in the molecule is protected with a suitable protecting group (e.g., a C₁₋₆ acyl group such as a C₂₋₆ alkanoyl group, e.g., formyl group, acetyl group, etc.), or conjugated peptides such as glycopeptides bound to sugar chains.

For salts of the metastins of the present invention, preferred are salts with physiologically acceptable acids (e.g., inorganic acids or organic acids) or bases (e.g., alkali metal salts), etc., especially physiologically acceptable acid addition salts. Examples of such salts include salts with, for example, inorganic acids (e.g., hydrochloric acid, phosphoric acid, hydrobromic acid, sulfuric acid); salts with organic acids (e.g., acetic acid, formic acid, propionic acid, fumaric acid, maleic acid, succinic acid, tartaric acid, citric acid, malic acid, oxalic acid, benzoic acid, methanesulfonic acid, benzenesulfonic acid) and the like.

As the DNAs encoding metastins, there are used, for example, DNAs encoding human metastin described in WO 00/24890, DNAs encoding mouse or rat metastin described in WO 01/75104, etc.

The DNAs encoding the metastins may be any of genomic DNA, genomic DNA library, cDNA derived from the cells and tissues described above, cDNA library derived from the cells and tissues described above and synthetic DNA. The vector to be used for the library may be any of bacteriophage, plasmid, cosmid and phagemid. The DNA may also be directly amplified by reverse transcriptase polymerase chain reaction (hereinafter abbreviated as RT-PCR) using the total RNA or mRNA fraction prepared from the cells and tissues described above.

The DNA encoding human metastin, mouse metastin precursor (A), mouse metastin precursor (B) or rat metastin precursor may be any DNA, so long as each is a DNA containing a base sequence represented by SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6 or SEQ ID NO: 8, or a DNA having a base sequence hybridizable to the base sequence represented by any base sequence represented by SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6 or SEQ ID NO: 8 under highly stringent conditions and encoding the human metastin, mouse metastin (A), mouse metastin (B) or rat metastin described above.

Specific examples of the DNA hybridizable to the base sequence represented by any of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6 or SEQ ID NO: 8 under highly stringent conditions include DNAs containing a base sequence having at least about 70% homology, preferably at least about 80% homology, more preferably at least about 90% homology and the most preferably at least about 95% homology, to the base sequence represented by any of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6 or SEQ ID NO: 8.

Homology in the base sequence can be measured under the following conditions (an expectation value=10; gaps are allowed; filtering ═ON; match score=1; mismatch score=−3) using the homology scoring algorithm NCBI BLAST (National Center for Biotechnology Information Basic Local Alignment Search Tool).

The hybridization can be carried out by per se publicly known methods or by modifications of these methods, for example, according to the method described in Molecular Cloning, 2nd (J. Sambrook et al., Cold Spring Harbor Lab. Press, 1989). A commercially available library may also be used according to the instructions of the attached manufacturer's protocol. Preferably, the hybridization can be carried out under highly stringent conditions.

The highly stringent conditions used herein are, for example, those in a sodium concentration at about 19 to 40 mM, preferably about 19 to 20 mM at a temperature of about 50 to 70° C., preferably about 60 to 65° C. In particular, hybridization conditions in a sodium concentration of about 19 mM at a temperature of about 65° C. are most preferred.

Specifically, as the DNA encoding the human metastin consisting of the amino acid sequence represented by SEQ ID NO: 1, the DNA consisting of the base sequence represented by SEQ ID NO: 2 is used. Accordingly, for the base sequence encoding the human metastin consisting of the various amino acid sequences described above, a base sequence corresponding to each of the partial amino acid sequences in the amino acid sequence represented by SEQ ID NO: 1 may be chosen from the base sequence represented by SEQ ID NO: 2.

As the DNA encoding the mouse metastin precursor (A) comprising the amino acid sequence represented by SEQ ID NO: 3, there are employed a DNA consisting of the base sequence represented by SEQ ID NO: 4, and the like. Accordingly, for the base sequence encoding the mouse metastin precursor (A) consisting of the various amino acid sequences described above, a base sequence corresponding to each of the partial amino acid sequences in the amino acid sequence represented by SEQ ID NO: 3 may be chosen from the base sequence represented by SEQ ID NO: 4.

As the DNA encoding the mouse metastin precursor (B) comprising the amino acid sequence represented by SEQ ID NO: 5, there are employed a DNA consisting of the base sequence represented by SEQ ID NO: 6, and the like. Accordingly, for the base sequence encoding the mouse metastin precursor (B) consisting of the various amino acid sequences described above, a base sequence corresponding to each of the partial amino acid sequences in the amino acid sequence represented by SEQ ID NO: 5 may be chosen from the base sequence represented by SEQ ID NO: 6.

As the DNA encoding the rat metastin comprising the amino acid sequence represented by SEQ ID NO: 7, there are employed a DNA consisting of the base sequence represented by SEQ ID NO: 8, and the like. Accordingly, for the base sequence encoding the rat metastin consisting of the various amino acid sequences described above, a base sequence corresponding to each of the partial amino acid sequences in the amino acid sequence represented by SEQ ID NO: 7 may be chosen from the base sequence represented by SEQ ID NO: 8.

More specifically, for the peptide consisting of the amino acid sequence represented by SEQ ID NO: 1 (human metastin 54 (1-54)), a DNA containing the base sequence represented by SEQ ID NO: 2, etc. is used.

For the peptide consisting of the N-terminal 40-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 (human metastin 15 (40-54); SEQ ID NO: 15), a DNA containing the base sequence represented by SEQ ID NO: 19, etc. is used.

For the peptide consisting of the N-terminal 45-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 (human metastin 10 (45-54); represented by SEQ ID NO: 16), a DNA containing the base sequence represented by SEQ ID NO: 20, etc. is used.

For the peptide consisting of the N-terminal 46-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 (human metastin 9 (46-54); represented by SEQ ID NO: 17), a DNA containing the base sequence represented by SEQ ID NO: 21, etc. is used.

For the peptide consisting of the N-terminal 47-54 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1 (human metastin 8 (47-54); represented by SEQ ID NO: 18), a DNA containing the base sequence represented by SEQ ID NO: 22, etc. is used.

As the metastin receptor, its partial peptides or salts thereof, there are used, for example, a human metastin receptor, its partial peptides or salts thereof described in WO 00/24890, a mouse or rat human metastin receptor, its partial peptides or salts thereof described in WO 01/75104, etc.

Specifically, the metastin receptor includes a protein containing the same or substantially the same amino acid sequence as the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, etc.

The amino acid sequence which has substantially the same amino acid sequence as the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13 includes, for example, an amino acid sequence having at least about 70% homology, preferably at least about 80% homology, more preferably at least about 90% homology, and most preferably at least about 95% homology, to the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13.

Homology of the amino acid sequences can be determined under the following conditions (an expectation value=10; gaps are allowed; matrix=BLOSUM62; filtering=OFF) using a homology scoring algorithm NCBI BLAST (National Center for Biotechnology Information Basic Local Alignment Search Tool).

As the protein having substantially the same amino acid sequence as the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, preferred is a protein having substantially the same amino acid sequence as the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13 and having the activity of the same nature as that of a protein consisting of the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, etc.

As the activity of substantially the same nature, there are, for example, a ligand binding activity, a signal transduction activity, and the like. The “substantially the same nature” is used to mean that the nature of these activities is equivalent in terms of quality. Thus, the activities such as a ligand binding activity, a signal transduction activity, etc. are preferably equivalent (e.g., about 0.01 to 100 times, preferably about 0.1 to 10 times, more preferably 0.5 to 2 times), but differences in degree such as a level of these activities, quantitative factors such as a molecular weight of the protein may be present and allowable.

The activities such as a ligand binding activity, a signal transduction activity, etc. can be assayed by per se publicly known method with modifications and may be determined according to methods of determining a ligand or screening methods described in, e.g., WO 00/24890 or WO 01/75104.

Examples of the metastin receptor used include proteins comprising (1) (i) the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, of which at least 1 or 2 (preferably about 1 to about 30, more preferably about 1 to about 10 and most preferably several (1 or 2)) amino acids are deleted; (ii) the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, to which at least 1 or 2 (preferably about 1 to about 30, more preferably about 1 to about 10 and most preferably several (1 or 2)) amino acids are added; (iii) the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, in which at least 1 or 2 (preferably about 1 to about 30, more preferably about 1 to about 10 and most preferably several (1 or 2)) amino acids are inserted; (iv) the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, in which at least 1 or 2 (preferably about 1 to about 30, more preferably about 1 to about 10 and most preferably several (1 or 2)) amino acids are substituted by other amino acids; or (v) a combination of these amino acid sequences; and the like.

Throughout the specification, the metastin receptors are represented in accordance with the conventional way of describing peptides, that is, the N-terminus (amino terminus) at the left hand and the C-terminus (carboxyl terminus) at the right hand. In the metastin receptors including the metastin receptor represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13, the C-terminus may be in any form of a carboxyl group (—COOH), a carboxylate (—COO—), an amide (—CONH₂) and an ester

(—COOR). Herein, examples of the ester group shown by R include a C₁₋₆ alkyl group such as methyl, ethyl, n-propyl, isopropyl, n-butyl, etc.; a C₃₋₈ cycloalkyl group such as cyclopentyl, cyclohexyl, etc.; a C₆₋₁₂ aryl group such as phenyl, α-naphthyl, etc.; a C₇₋₁₄ aralkyl such as a phenyl-C₁₋₂ alkyl group, e.g., benzyl, phenethyl, etc.; an α-naphthyl-C₁₋₂ alkyl group such as α-naphthylmethyl, etc.; and pivaloyloxymethyl group, which are widely used as an ester for oral use, and the like.

Where the metastin receptors contain a carboxyl group (or a carboxylate) at a position other than the C-terminus, the carboxyl group may be amidated or esterified and such amides or esters are also included within the receptor protein of the present invention. In this case, the ester group used may be the same group as the C-terminal esters described above.

Furthermore, the metastin receptors include those wherein the amino group at the N-terminal methionine residue is protected with a protecting group (e.g., a C₁₋₆ acyl group such as a C₂₋₆ alkanoyl group, e.g., formyl group, acetyl group, etc.); those wherein the N-terminal region is cleaved in vivo and the glutamyl group thus formed is pyroglutaminated; those wherein a substituent (e.g., —OH, —SH, amino group, imidazole group, indole group, guanidino group, etc.) on the side chain of an amino acid in the molecule is protected with a suitable protecting group (e.g., a C₁₋₆ acyl group such as a C₂₋₆ alkanoyl group, e.g., formyl group, acetyl group, etc.), or conjugated proteins such as glycoproteins bound to sugar chains.

Specific examples of the metastin receptors include human metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 9, rat metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 11, mouse metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 13, etc.

The partial peptides of the metastin receptor (hereinafter sometimes simply referred to as the partial peptide) may be any peptide, so long as they are partial peptides of the metastin receptor described above; there are used those such as protein molecules of the metastin receptor, which are the sites exposed outside the cell membrane, and having a ligand binding activity.

Specifically, the partial peptide of the metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 9, SEQ ID NO: 11 or SEQ ID NO: 13 is a peptide containing the parts analyzed to be extracellular domains (hydrophilic domains) in the hydrophobic plotting analysis. A peptide containing a hydrophobic domain in part can be used as well. In addition, the peptide may contain each domain separately or a plurality of domains together.

In the metastin receptor, preferred partial peptides are those having the number of amino acids of at least 20, preferably at least 50, and more preferably at least 100, in the amino acid sequence described above, which constitutes the metastin receptor.

The partial peptide may be a peptide having the amino acid sequence described above, of which at least 1 or 2 (preferably about 1 to about 10 and more preferably several (1 or 2)) amino acids are deleted; to which at least 1 or 2 (preferably about 1 to about 10 and more preferably several (1 or 2)) amino acids are added; or, in which at least 1 or 2 (preferably about 1 to about 10 and more preferably several (1 or 2)) amino acids are substituted by other amino acids.

In the partial peptide, the C terminus may be any form of a carboxyl group (—COOH), a carboxylate (—COO—), an amide (—CONH₂) and an ester (—COOR), as in the metastin receptor described above.

Furthermore, the partial peptides include peptides, wherein the amino group at the N-terminal methionine residue is protected with a protecting group; those wherein the N-terminal region is cleaved in vivo and the glutamyl group thus formed is pyroglutaminated; those wherein a substituent on the side chain of an amino acid in the molecule is protected with a suitable protecting group, or conjugated peptides such as glycopeptides bound to sugar chains, as in the metastin receptors described above.

For salts of the metastin receptor or the partial peptide, preferred are salts with physiologically acceptable acids, especially physiologically acceptable acid addition salts. Examples of the salts include salts with, for example, inorganic acids (e.g., hydrochloric acid, phosphoric acid, hydrobromic acid, sulfuric acid); salts with organic acids (e.g., acetic acid, formic acid, propionic acid, fumaric acid, maleic acid, succinic acid, tartaric acid, citric acid, malic acid, oxalic acid, benzoic acid, methanesulfonic acid, benzenesulfonic acid) and the like.

As the DNA encoding the metastin receptor or its partial peptides, there are used, for example, a DNA encoding the human metastin receptor or its partial peptides described in WO 00/24890, a DNA encoding the mouse or rat human metastin receptor or its partial peptides described in WO 01/75104, etc.

The DNAs encoding the metastin receptor or its partial peptides may be any of genomic DNA, genomic DNA library, cDNA derived from the cells and tissues described above, cDNA library derived from the cells and tissues described above and synthetic DNA. The vector to be used for the library may be any of bacteriophage, plasmid, cosmid and phagemid. The DNA may also be directly amplified by reverse transcriptase polymerase chain reaction (hereinafter abbreviated as RT-PCR) using the total RNA or mRNA fraction prepared from the cells and tissues described above.

Specifically, the DNA encoding human metastin receptor, mouse metastin receptor or rat metastin receptor may be any DNA, so long as it is a DNA containing each base sequence represented by SEQ ID NO: 10, SEQ ID NO: 12 or SEQ ID NO: 14, or a DNA containing a base sequence hybridizable to the base sequence represented by SEQ ID NO: 10, SEQ ID NO: 12 or SEQ ID NO: 14 under highly stringent conditions and encoding a receptor having the activity of substantially the same nature (e.g., a ligand binding activity, a signal transduction activity, etc.) as that of the human metastin receptor, mouse metastin receptor or rat metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 10, SEQ ID NO: 12 or SEQ ID NO: 14.

Examples of the DNA hybridizable to the base sequence represented by any of SEQ ID NO: 10, SEQ ID NO: 12 or SEQ ID NO: 14 include DNAs containing a base sequence having at least about 70% homology, preferably at least about 80% homology, more preferably at least about 90% homology and the most preferably at least about 95% homology, to the base sequence represented by any of SEQ ID NO: 10, SEQ ID NO: 12 or SEQ ID NO: 14.

Homology in the base sequence can be measured under the following conditions (an expectation value=10; gaps are allowed; filtering ═ON; match score=1; mismatch score=−3) using the homology scoring algorithm NCBI BLAST (National Center for Biotechnology Information Basic Local Alignment Search Tool).

The hybridization can be carried out by per se publicly known methods or by modifications of these methods, for example, according to the method described in Molecular Cloning, 2nd (J. Sambrook et al., Cold Spring Harbor Lab. Press, 1989), etc. A commercially available library may also be used according to the instructions of the attached manufacturer's protocol. Preferably, the hybridization can be carried out under highly stringent conditions.

The highly stringent conditions used herein are, for example, those in a sodium concentration at about 19 to 40 mM, preferably about 19 to 20 mM at a temperature of about 50 to 70° C., preferably about 60 to 65° C. In particular, hybridization conditions in a sodium concentration of about 19 mM at a temperature of about 65° C. are most preferred.

More specifically, as the DNA encoding the human metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 9, the DNA consisting of the base sequence represented by SEQ ID NO: 10 is used.

As the DNA encoding the rat metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 11, the DNA consisting of the base sequence represented by SEQ ID NO: 12 is used.

As the DNA encoding the mouse metastin receptor consisting of the amino acid sequence represented by SEQ ID NO: 13, the DNA consisting of the base sequence represented by SEQ ID NO: 14 is used.

The metastin receptors, their partial peptides or salts thereof and the DNAs encoding the metastin receptors or their partial peptides can be obtained or produced by the methods described in WO 00/24890 or WO 01/75104.

The present invention will be described in detail by referring to EXAMPLES, FORMULATION EXAMPLES AND TEST EXAMPLES, but is not deemed to be limited thereto, and any modification may be made without departing from the scope of the present invention.

In the following EXAMPLES, the term “room temperature” normally means a temperature of about 10° C. to 35° C. In percentages, the yield is shown by mol/mol % and the solvent used in chromatography by vol %, and the remaining by wt %. In proton NMR spectra, data on OH, NH protons, etc. that are broad and unidentified are not shown.

The other abbreviations used in the specification mean as follows.

Abbreviation Description

10Ψ,CSNH: C-terminal-CONH₂ at the 10-position is substituted with —CSNH₂. 1Ψ2,CH₂NH: The —CONH— bond between the 1- and 2-positions is substituted with the —CH₂NH— bond. 2Ψ3,CH₂NH: The —CONH— bond between the 2- and 3-positions is substituted with the —CH₂NH— bond. 3Ψ4,CH₂NH: The —CONH— bond between the 3- and 4-positions is substituted with the —CH₂NH— bond. 4Ψ5,CH₂NH: The —CONH— bond between the 4- and 5-positions is substituted with the —CH₂NH— bond. 6Ψ7,CSNH: The —CONH— bond between the 6- and 7-positions is substituted with the —CSNH— bond. 6Ψ7,NHCO: The —CONH— bond between the 6- and 7-positions is substituted with the —NHCO— bond. 6Ψ7,CH₂NH: The —CONH— bond between the 6- and 7-positions is substituted with the —CH₂NH— bond. 6Ψ7,CH₂O: The —CONH— bond between the 6- and 7-positions is substituted with the —CH₂O— bond. 7Ψ8,CH₂NH: The —CONH— bond between the 7- and 8-positions is substituted with the —CH₂NH— bond. 8Ψ9,CH₂NH: The —CONH— bond between the 8- and 9-positions is substituted with the —CH₂NH— bond. 9Ψ10,CH₂NH: The —CONH— bond between the 9- and 10-positions is substituted with the —CH₂NH— bond. Abu: 2-aminobutanic acid Ac: acetyl Acp: 6-aminocaproic acid AcOEt: ethyl acetate AcOH: acetic acid Aib: α-aminoisobutanoic acid Ala(2-Qui): 2-quinolylalanine Ala(3-Bzt): 3-benzothienylalanine Alb: Albizziin 2-amino-3-ureidopropion acid Arg(Ac): N^(ω)-acetylarginine Arg(Boc₂,Me): NO^(ω,ω′)-bis-tert-butoxycarbonyl-N^(ω)-methylarginine Arg(Et): N^(ω)-ethylarginine Arg(Me): N^(ω)-methylarginine Arg(asyMe₂) or Arg(Me₂)asym: asymmetric-N^(ω,ω′)-dimethylarginine Arg(symMe₂) or Arg(Me₂)sym: symmetric-N^(ω,ω′)-dimethylarginine Arg(NO₂): N^(ω)-methylarginine Arg(n-Pr): N^(ω)-propylarginine Arg(Tos): N^(ω)-tosylarginine Asp(NHMe): N^(ω)-methylasparagine Asp(Nme2): N^(ω)-dimethylasparagine AzaGly: azaglycine AzaPhe: azaphenylalanine Aze(2): azetidine-2-carboxylic acid β-Ala: β-alanine Boc: tert-butoxycarbonyl Boc₂O: di-tert-butyl dicarbonate Br-Z: 2-bromobenzyloxycarbonyl Bu^(t): tert-butyl Bzl: benzyl CDI: 1,1′-carbonyldiimidazole Cha: cyclohexylalanine CIP: 2-chloro-1,3-dimethylimidazolium tetrafluoroborate Cit: citrulline Clt resin: 2-chlorotrytyl resin Cl-Z: 2-chlorobenzyloxycarbonyl Dab: 2,4-diaminobutanoic acid Dap: 2,3-diaminopropionic acid Dap(Ac): N^(β)-acetyldiaminopropionic acid Dap(For): N^(β)-formyldiaminopropionic acid Dap(Gly): N^(β)-glycyldiaminopropionic acid Dap(GnGly): N^(β)-(N-guanidinoglycyl)diaminopropionic acid DCM: dichloromethane DEA: diethylamine

DIEA: N,N-diisopropylethylamine

DIPCDI: 1,3-diisopropylcarbodiimide DMAP: 4-dimethylaminopyridine

DMF: N,N-dimethylformamide

EDT: 1,2-ethanedithiol Fmoc: 9-fluorenylmethoxycarbonyl For: formyl γ-Abu: 4-aminobutanoic acid γ-MeLeu: γ-methylleucine Gn: guanidino GuAmb: 4-guanidinomethylbenzoyl Har: homoarginine Har(Me): N^(ω)-methylhomoarginine HOAt: 1-hydroxy-7-azabenzotriazole HOBt: 1-hydroxybenzotriazole HONB: N-hydroxy-5-norbornene-2,3-dicarboxamide Hph: homophenylalanine Hyp: trans-4-hydroxyproline IndPr: 3-(indol-3-yl)propionyl Lys(Me₂): N^(ε,ε-dimethyllysine) MBHA: p-methylbenzhydrylamine MeOH: methanol Mtt: 4-methyltrytyl N((CH₂)₃Gn)Gly: N-(3-guanidinopropyl)glycine Nal(1):1-naphthylalanine Nal(2): 2-naphthylalanine Nar: norarginine Nar(Me): N^(ω)-methylnorarginine Nle: norleucine NMeArg: N^(α)-methylarginine NMeAsn: N^(α)-methylasparagine NMeLeu: N^(α)-methylleucine NMePhe: N^(α)-methylphenylalanine NMeSer: N^(α)-methylserine NMeTrp: N^(α)-methyltryptophan NMeTyr: N^(α)-methyltyrosine

Nva: Norvaline

Orn: ornithine Orn(Mtt): N^(δ)-(4-methyltrytyl)ornithine PAL: 5-(4-(9-fluorenylmethoxycarbonyl)aminomethyl-3,5-dimethoxy-phenoxy)valeric acid Pbf: 2,2,4,6,7-pentamethyldihydrobenzofuran-5-sulfonyl pGlu: pyroglutamic acid Phe(2Cl): 2-chlorophenylalanine Phe(2F): 2-fluorophenylalanine Phe(3,4Cl₂): 3,4-dichlorophenylalanine Phe(3,4F₂): 3,4-difluorophenylalanine Phe(3 CF₃): 3-trifluoromethylphenylalanine Phe(3Cl): 3-chlorophenylalanine Phe(3F): 3-fluorophenylalanine Phe(4Cl): 4-chlorophenylalanine Phe(4CN): 4-cyanophenylalanine Phe(4F): 4-fluorophenylalanine Phe(4Gn): 4-guanidinophenylalanine Phe(4NH₂): 4-aminophenylalanine Phe(4NO₂): 4-nitrophenylalanine Phe(4CN): 4-cyanophenylalanine Phe(F₅): pentafluorophenylalanine PheΨ(CH₂O)Gly: The —CONH— bond between Phe and Gly is substituted with the —CH₂O— bond. PheΨ(CSNH)—NH₂: The C-terminal phenylalanylamide is substituted with the phenylalanylthioamide. Phg: phenylglycine PhOH: phenol PhSMe: thioanisole Pip(2): 2-aminopipecolinic acid Pro: proline Pya(2): 2-pyridylalanine Pya(3): 3-pyridylalanine Pya(4): 4-pyridylalanine PyAOP: (7-azabenzotriazole-1-yloxy)-tris(pyrrolidino)phosphonium hexafluorophosphate PyBOP: (benzotriazole-1-yloxy)-tris(pyrrolidino)phosphonium hexafluorophosphate PyBrop: bromo-tris(pyrrolidino)phosphonium hexafluorophosphate

Sar: N-methylglycine Ser(Ac): O-acetylserine Ser(Me): O-methylserine

Thi: 2-thienylalanine Tic: 1,2,3,4-tetrahydroisoquinoline-2-carboxylic acid TIS: triisopropylsilane Tle: tert-leucine Tos: tosyl Trp(For): N^(in)-foyltryptophan Trt: trytyl

Tyr(Me): O-methyltyrosine

TyrΨ(CH₂NH)Asn: The —CONH— bond between Tyr and Asn is substituted with the —CH₂NH— bond. TFA: trifluoroacetic acid TFE: trifluoroethanol Z: benzyloxycarbonyl

In the specification and drawings, the codes of bases and amino acids are denoted in accordance with the IUPAC-IUB Commission on Biochemical Nomenclature or by the common codes in the art, examples of which are shown below. For amino acids that may have the optical isomer, L form is presented unless otherwise indicated.

DNA: deoxyribonucleic acid cDNA: complementary deoxyribonucleic acid A: adenine T: thymine G: guanine C: cytosine Y: thymine or cytosine N: thymine, cytosine, adenine or guanine R: adenine or guanine M: cytosine or adenine W: thymine or adenine S: cytosine or guanine RNA: ribonucleic acid mRNA messenger ribonucleic acid dATP: deoxyadenosine triphosphate dTTP: deoxythymidine triphosphate dGTP deoxyguanosine triphosphate dCTP: deoxycytidine triphosphate ATP: adenosine triphosphate EDTA: ethylenediaminetetraacetic acid SDS: sodium dodecyl sulfate TFA: trifluoroacetic acid EIA: enzyme immunoassay Gly or G: glycine Ala or A: alanine Val or V valine Leu or L: leucine Ile or I: isoleucine Ser or S: serine Thr or T: threonine Cys or C: cysteine Met or M: methionine Glu or E glutamic acid Asp or D: aspartic acid Lys or K: lysine Arg or R: arginine His or H: histidine Phe or F: phenylalanine Tyr or Y: tyrosine Trp or W: tryptophan Pro or P: proline Asn or N: asparagine Gln or Q: glutamine pGlu: pyroglutamic acid

The sequence identification numbers in the sequence listing of the specification indicates the following sequence, respectively.

SEQ ID NO: 1

This shows the amino acid sequence of human-derived metastin (Metastin).

SEQ ID NO: 2

This shows the base sequence of DNA encoding human metastin.

SEQ ID NO: 3

This shows the amino acid sequence of mouse metastin precursor (A).

SEQ ID NO: 4

This shows the base sequence of DNA encoding mouse metastin precursor (A), which is the base sequence contained in plasmid pCMV-mKiSS-1 harbored on transformant Escherichia coli DH10B/pCMV-mKiSS-1.

SEQ ID NO: 5

This shows the amino acid sequence of mouse metastin precursor (B).

SEQ ID NO: 6

This shows the base sequence of DNA encoding mouse metastin precursor (B), which is the base sequence contained in plasmid pCR2.1-mKiSS-1.4A harbored on transformant Escherichia coli DH5α/pCR2.1-mKiSS-1.4A.

SEQ ID NO: 7

This shows the amino acid sequence of rat-derived metastin precursor.

SEQ ID NO: 8

This shows the base sequence of DNA encoding rat metastin precursor.

SEQ ID NO: 9

This shows the amino acid sequence of human OT7T175 (metastin receptor).

SEQ ID NO: 10

This shows the base sequence of DNA encoding human OT7T175 (metastin receptor).

SEQ ID NO: 11

This shows the amino acid sequence of rat OT7T175 (metastin receptor).

SEQ ID NO: 12

This shows the base sequence of DNA encoding rat OT7T175 (metastin receptor).

SEQ ID NO: 13

This shows the amino acid sequence of mouse OT7T175 (metastin receptor).

SEQ ID NO: 14

This shows the base sequence of DNA encoding mouse OT7T175 (metastin receptor).

SEQ ID NO: 15

This shows the amino acid sequence of human metastin 15 (40-54).

SEQ ID NO: 16

This shows the amino acid sequence of human metastin 10 (45-54) (MS10).

SEQ ID NO: 17

This shows the amino acid sequence of human metastin 9 (46-54).

SEQ ID NO: 18

This shows the amino acid sequence of human metastin 8 (47-54).

SEQ ID NO: 19

This shows the base sequence of DNA encoding human metastin 15 (40-54).

SEQ ID NO: 20

This shows the base sequence of DNA encoding human metastin 10 (45-54).

SEQ ID NO: 21

This shows the base sequence of DNA encoding human metastin 9 (46-54).

SEQ ID NO: 22

This shows the base sequence of DNA encoding human metastin 8 (47-54).

The transformant Escherichia coli DH10B/pCMV-mKiSS-1 has been on deposit since Jan. 24, 2000 with International Patent Organisms Depository, National Institute of Advanced Industrial Science and Technology (the former Ministry of International Trade and Industry, Agency of Industrial Science and Technology, National Institute of Bioscience and Human Technology (NIBH)), located at Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki (postal code 305-8566), Japan as the Accession Number FERM BP-7003 and since Dec. 16, 1999 with Institute for Fermentation (IFO), located at 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka-shi, Osaka, Japan, as the Accession Number IFO 16348.

The transformant Escherichia coli DH5α/pCR2.1-mKiSS-1.4A has been on deposit since Mar. 6, 2000 with International Patent Organisms Depository, National Institute of Advanced Industrial Science and Technology (the former Ministry of International Trade and Industry, Agency of Industrial Science and Technology, National Institute of Bioscience and Human Technology (NIBH)), located at Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki (postal code 305-8566), Japan as the Accession Number FERM BP-7073 and since Feb. 16, 2000 with Institute for Fermentation (IFO), located at 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka-shi, Osaka, Japan, as the Accession Number IFO 16360.

In the present invention, Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ (SEQ ID NO: 16) is referred to as metastin 10 (Metastin10), i.e., MS10.

In EXAMPLES later described, the N-terminal Tyr and the C-terminal Phe in MS10 are counted as the 1- and 10-positions, respectively.

Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH₂ 1   2   3   4   5   6   7   8   9   10

For example, [Hph10]MS10 of Compound No. 79 (EXAMPLE 1) means a peptide wherein the C-terminal Phe (10-position) of MS10 is substituted with Hph.

For example, des(1)-MS10 of Compound No. 4 means a peptide wherein the N-terminal Tyr (1-position) is deleted.

For example, des(1-3)-Fmoc-MS10 of Compound No. 53 means a peptide wherein the N-terminal Tyr-Asn-Trp (1 to 3-positions) is deleted and the amino group of Asn at the 4-position is modified and protected with Fmoc.

EXAMPLE 1 Synthesis Process A Preparation of [Hph10]MS10 (Compound No. 79)

Using 51 mg of Fmoc-Hph-PAL resin (sub. 0.39 mmol/g), which was prepared by introducing Fmoc-Hph into commercially available PAL resin, the peptide chain was extended on a multiple peptide synthesizer ACT-396 to give Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGlyLeuArg(Pbf)Hph-PAL resin. To 18.2 mg of the resin, 200 μL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added and the mixture was shaken for 2 hours. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution was performed with eluants A/B: 73/27-63/37 using elution A: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 2.6 mg of white powders.

Mass spectrum (M+H)⁺ 1316.5 (Calcd. 1316.7)

Elution time on HPLC: 20.6 min

Elution Conditions

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 2 Synthesis Process B Preparation of [Trp10]MS10 (Compound No. 186)

Using 379 mg of Fmoc-Arg(Pbf)-O-Clt resin (sub. 0.33 mmol/g), which was prepared by introducing Fmoc-Arg(Pbf)-OH into commercially available 2-chliorotritylchloride resin (Clt resin,1.33 mmol/g), the peptide chain was extended on ABI 433A to give 540 mg of Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGlyLeuArg(Pbf)-O-Clt resin. To 270 mg of the peptide, 10 mL of AcOH/TFE/DCM (1/1/8) was added the mixture was shaken for 30 minutes. After the resin was removed by filtration, the solvent was concentrated and the residue was dissolved in AcOEt. The solution was then washed with satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and diethyl ether-petroleum ether was added to the residue to give 68 mg of Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGlyLeuArg(Pbf)-OH as the precipitate. To 22 mg of the peptide, 4 mg of HCl H-Trp(For)-NH₂ (prepared by treating Boc-Trp(For)-NH₂ with 9.7 N HCl/dioxane at 0° C. for 30 minutes), 10 mg of PyAOP, 5 mg of HOAt and 11 μL of DIEA were added. The mixture was stirred for 15 hours. After the solvent was concentrated, chloroform-diethyl ether was added to the residue to give Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGlyLeuArg(Pbf)Trp(For)-NH₂ as the precipitate. To the peptide, 1 mL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added and the mixture was stirred for 2 hours. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (30 minutes) was performed with eluants A/B: 73/27-63/37 using eluant A: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 2.0 mg of white powders.

Mass spectrum (M+H)⁺ 1369.3 (Calcd. 1369.6)

Elution time on HPLC: 19.6 min

Elution Conditions

Column: Wakosil-115C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 3 Synthesis Process C Preparation of [10Ψ,CSNH]MS10 (Compound No. 128)

After 264 mg of Boc-Phe-NH₂ was dissolved in 20 mL of THF, 1.62 g of Lawesson's reagent was added to the solution, followed by stirring for 24 hours. Insoluble matters were removed by filtration, the solvent was concentrated and the concentrate was dissolved in AcOEt. The solution washed over satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography. Diethyl ether-petroleum ether was added to give 275 mg (yield 98%) of (S)-2-tert-Butoxycarbonylamino-3-phenylpropanethioamide(Boc-PheΨ(CSNH)—NH₂) as the precipitate. After 42 mg of the peptide was treated at 0° C. with 9.7 N HCl to remove Boc, the removal of Fmoc with 10% DEA/DMF treatment followed by condensation by the PyBOP/HOBt method were repeated to give 66 mg of Fmoc-LeuArg(Pbf)PheΨ(CSNH)—NH₂ (yield 93%). To 17 mg of Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGly-OH prepared as in EXAMPLE 2, H-LeuArg(Pbf)PheΨ(CSNH)—NH₂ (prepared by treating 14 mg of Fmoc-LeuArg(Pbf)PheΨ(CSNH)—NH₂ with 10% DEA/DMF), 9 mg of PyBrop, 3 mg of HOAt and 7 mL of DIEA were added and the mixture was stirred for 15 hours. After the solvent was concentrated, chloroform-diethyl ether was added thereto for precipitation. To 10 mg of the product, 100 μL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added and the mixture was stirred for 2 hours. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (30 minutes) was performed with eluants A/B: 72/28-62/38 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 1.0 mg of white powders.

Mass spectrum (M+H)⁺ 1318.4 (Calcd. 1318.6)

Elution time on HPLC: 21.8 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 4 Synthesis Process D Preparation of [6Ψ7,CH₂NH]MS10 (Compound No. 163)

Using 321 mg of Fmoc-Phe-PAL resin, which was prepared by introducing Fmoc-Phe into commercially available PAL resin, the peptide chain was extended on ABI 433A to give Fmoc-LeuArg(Pbf)Phe-PAL resin. To a half volume of the peptide, Fmoc-Gly was condensed to give 190 mg of Fmoc-GlyLeuArg(Pbf)Phe-PAL resin. After 76 mg of the product was subjected to Fmoc deprotection, 2 mL of DMF, 50 μL of AcOH, 46 mg of Fmoc-Phe-H and 8 mg of NaBH₃CN were added thereto, followed by shaking an hour. After the resin washed, 2 mL of DMF, 22 μL of DIEA and 18 μL of Z-Cl were added thereto and the mixture was shaken for 3 hours. After the resin washed, the peptide chain was extended on ABI 433A to give Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(But)PheΨ(CH₂NZ)GlyLeuArg(Pbf)Phe-PA L resin. Under ice cooling, 46 μL of TMS-Br, 42 μL of PhSMe, 38 μL of m-cresol, 18 μL of EDT and 227 μL of TFA were added to 15 mg of the peptide an the mixture was stirred for 2 hours. After the solvent was removed by distillation, diethyl ether was added to the residue, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (30 minutes) was performed with eluants A/B: 72/28-62/38 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 2.0 mg of white powders.

Mass spectrum (M+H)⁺ 1288.7 (Calcd. 1288.7)

Elution time on HPLC: 18.2 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-0/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

REFERENCE EXAMPLE 1 Preparation of N-methyl-N,N′-Bis-Boc-1-guanylpyrazole

Under a nitrogen flow, 720 mg of 60% NaH in oil was dissolved in 20 mL of dry DMF and 20 mL of dry DMF solution of 5.59 g of N,N′-Bis-Boc-1-guanylpyrazole commercially available was added to the solution at 0° C., followed by stirring for 10 minutes. After 1.68 mL of methyl iodide was added thereto, the mixture was stirred at room temperature for 24 hours. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography (ethyl acetate/n-hexane=1/4) using silica gel 60 (200 mL) to give 5.35 g (yield 91.6%) of N-methyl-N,N′-bis-Boc-1-guanylpyrazole.

¹H NMR (300 MHz, CDCl₃): δ 8.00 (br s, 1H), 7.69 (br s, 1H), 6.42 (dd, 1H, J=2.7, 1.5 Hz), 3.25 (s, 3H), 1.53 (s, 9H), 1.30 (s, 9H)

Elemental analysis as C₁₅H₂₄N₄O₄

Calcd.: C, 55.54; H, 7.46; N, 17.27.

Found: C, 55.36; H, 7.48; N, 17.06.

Rf1: 0.64, Rf2: 0.79

Developing solvent for TLC: Rf1 (ethyl acetate/n-hexane=1/2), Rf2 (methanol/chloroform=2/98)

Elution time on HPLC: 26.7 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-20/80, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (40 mins.)

Flow rate: 1.0 ml/min.

REFERENCE EXAMPLE 2 Preparation of N-methyl-N,N′-Bis-Z-1-guanylpyrazole

In an argon atmosphere, 40 mg of 60% NaH in oil was dissolved in 5 mL of dry DMF and 5 mL of dry DMF solution of 380 mg of N,N′-Bis-Z-1-guanylpyrazole commercially available was added to the solution at 0° C., followed by stirring for 10 minutes. After 125 μL of methyl iodide was added thereto, the mixture was stirred at room temperature for 15 hours. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated to give 393 mg of the crude product. From the crude product 170 mg was purified by flush column chromatography (ethyl acetate/n-hexane=1/4) using silica gel 60 (75 mL) to give 152 mg (yield 89.5%) of N-methyl-N,N′-bis-Z-1-guanylpyrazole.

¹H NMR (300 MHz, CDCl₃): δ 7.97 (br s, 1H), 7.61 (d, 1H, J=1.0 Hz), 7.37-7.32 (m, 4H), 7.29-7.26 (m, 4H), 7.16-7.13 (m, 2H), 6.36 (dd, 1H, J=2.8, 1.6 Hz), 5.18 (s, 2H), 5.04 (s, 2H), 3.22 (s, 3H)

Elemental analysis as C₂₁H₂₀N₄O₄

Calcd.: C, 64.28; H, 5.14; N, 14.28

Found: C, 64.09; H, 5.24; N, 14.43

Rf1: 0.50, Rf2: 0.86

Developing solvent for TLC: Rf1(ethyl acetate/n-hexane=1/2), Rf2(methanol/chloroform=2/98)

Elution time on HPLC: 28.9 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-20/80, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (40 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 5 Synthesis Process E Preparation of [Arg(Me)9]MS10 (Compound No. 82)

Using 480 mg of Fmoc-Phe-Rink Amide MBHA resin, which was prepared by introducing Fmoc-Phe into Rink Amide MBHA resin commercially available, the peptide chain was extended on ABI 433A to give 1080 mg of Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGlyLeuOrn(Mtt)Phe-Rink Amide MBHA resin. To 540 mg of the peptide, 10 mL of TFA/TIS/DCM (Jan. 5, 1994) was added and the mixture was shaken for 50 minutes. The resin washed and then dried. After 2 mL of DMF, 49 mg of N-methyl-N,N′-bis-Boc-1-guanylpyrazole prepared in REFERENCE EXAMPLE 1 and 87 μL of DIEA were added to 2/5 volume of the resin, the mixture was shaken for 15 hours to give 220 mg of Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGlyLeuArg(Boc₂,Me)Phe-Rink Amide MBHA resin. To 50 mg of the peptide, 1 mL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added and the mixture was stirred for 2 hours. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (30 minutes) was performed with eluants A/B: 74/26-64/36 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 10.5 mg of white powders.

Mass spectrum (M+H)⁺ 1316.5 (Calcd. 1316.7)

Elution time on HPLC: 20.1 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

N-Methyl-N,N′-bis-Boc-1-guanylpyrazole used to convert the amino acid at the 9-position into N^(ω)-methylated Arg in this EXAMPLE is a reagent useful for producing peptides containing N^(ω)-methylated Arg, and is advantageously used also in general peptides to produce peptides containing N^(ω)-methylated Arg characterized by reacting N-methyl-N,N′-bis-Boc-1-guanylpyrazole with Orn in peptides followed by deprotection.

Furthermore, blood stability is improved by converting Arg into N^(ω)-methylated Arg not only in the N^(ω)-methylated Arg-containing peptide obtained in this EXAMPLE but also in general peptides. Therefore, substituents on the side chain of N^(ω)-methylated Arg are useful for a method of enhancing blood stability, which comprises converting Arg in a peptide into N^(ω)-methylated Arg.

Moreover, a method of enhancing blood stability, which comprises introducing one or two (preferably one) alkyl group, preferably C₁₋₄ alkyl group, more preferably methyl group into the side chain of Arg in the Arg-containing peptide, may be provided. Herein, the Arg-containing peptide includes, for example, a peptide having a partial peptide characterized by the structure -Arg-XXX-, wherein XXX represents an amino acid having optionally substituted aromatic ring group into the side chain, preferably Phe, Trp, Tyr, etc.

The N^(ω)-methylated Arg-containing peptides can also be produced using not only N-methyl-N,N′-bis-Boc-1-guanylpyrazole but N-methyl-N,N′-bis-Z-1-guanylpyrazole prepared in REFERENCE EXAMPLE 2.

EXAMPLE 6 Synthesis Process F Preparation of [6Ψ7,CSNH]MS10 (Compound No. 166)

In 10 mL of DMF, 503 mg of HCl H-Gly-OBu^(t) was dissolved and 1162 mg of Fmoc-Phe, 608 mg of HOBt, 1874 mg of PyBOP and 784 μL of DIEA were added at 0° C., followed by stirring for 4 hours. The solvent was concentrated and the concentrate was dissolved in AcOEt. The solution was then washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and diethyl ether-petroleum ether was added to give 1.48 g (yield 99%) of Fmoc-PheGly-OBu^(t) as the precipitate. After 250 mg of the product was dissolved in 10 mL of toluene, 404 mg of Lawesson's reagent was added to the solution, followed by stirring at 80° C. for 2 hours. The solvent was concentrated and the concentrate was dissolved in AcOEt. The solution was then washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography. Diethyl ether-petroleum ether was added to the eluate to give 207 mg (yield 80%) of Fmoc-PheΨ(CSNH)Gly-OBu^(t) as the precipitate. To 103 mg of the product, TFA/H₂O (95/5) was added and the mixture was stirred for an hour. After the solvent was concentrated, diethyl ether was added to give 82.4 mg (yield 90%) of Fmoc-PheΨ(CSNH)Gly-OH as the precipitate. Using Fmoc-Phe-PAL resin, which was prepared by introducing Fmoc-Phe into commercially available PAL resin, the peptide chain was extended on ABI 433A and 80 mg of Fmoc-LeuArg(Pbf)Phe-PAL resin thus extended was subjected to Fmoc deprotection. Then 35 mg of Fmoc-PheΨ(CSNH)Gly-OH, 47 mg of PyBrop, 14 mg of HOAt and 35 μL of DIEA were added to the resin, followed by shaking for 15 hours. After the resin washed, the peptide chain was extended on ABI 433A to give Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheΨ(CSNH)GlyLeuArg(Pbf)Phe-PA L resin. To 15 mg of the product, 200 μL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added, followed by stirring for 2 hours. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 77/23-57/43 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 1.0 mg of white powders.

Mass spectrum (M+H)⁺ 1318.7 (Calcd. 1318.6)

Elution time on HPLC: 20.8 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 7 Synthesis Process G Preparation of [AzaGly7]MS10 (Compound No. 176)

Using 321 mg of Fmoc-Phe-PAL resin, which was prepared by introducing Fmoc-Phe into commercially available PAL resin, the peptide chain was extended on ABI 433A and 80 mg of Fmoc-LeuArg(Pbf)Phe-PAL resin thus extended was subjected to Fmoc deprotection. After 2 mL of THF and 16 mg of CDI were added, the mixture was shaken for 2 hours. Then 6 μL of hydrazine monohydrate was added to the mixture. The mixture was shaken for an hour and the resin was then washed. After 39 mg of Fmoc-Phe, 93 mg of PyBrop, 27 mg of HOAt and 105 μL of DIEA were added to the system, followed by shaking for 2 hours. After the resin washed, the peptide chain was extended on ABI 433A to give Boc-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheAzaGlyLeuArg(Pbf)Phe-PAL resin. To 25 mg of the product, 1 mL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added, followed by shaking for 2 hours. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (30 minutes) was performed with eluants A/B: 74/26-64/36 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 5.5 mg of white powders.

Mass spectrum (M+H)⁺ 1303.3 (Calcd. 1303.6)

Elution time on HPLC: 18.9 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 8 Synthesis Process H Preparation of [D-Tyr1,AzaGly7,Arg(Me)9]MS10 (Compound No. 232)

Fmoc-Phe,Fmoc-Orn(Mtt) was introduced into 4 g (0.55 mmol/g) of Rink Amide MBHA resin commercially available to prepare Fmoc-Orn(Mtt)-Phe-Rink Amide MBHA resin, and 50 mL of TFA/TIS/DCM (Jan. 5, 1994) was added to the resin, followed by shaking for 50 minutes. After the resin washed, 40 mL of DCM and 2.27 g of N-methyl-N,N′-bis-Boc-1-guanylpyrazole prepared in REFERENCE EXAMPLE 1 were added to the resin. DIEA was added to the mixture to adjust pH of the solution to 9. The mixture was shaken for 15 hours to give 4.74 g of Fmoc-Arg(Boc₂,Me)Phe-Rink Amide MBHA resin. Separately, 145 mg of Fmoc-NHNH₂HCl was suspended in 10 mL of THF. Under ice cooling, 89 mg of CDI and 87 mL of DIEA were added to the suspension, followed by stirring at room temperature for an hour. Under ice cooling, a solution of 224 mg of H-Leu-OBu^(t) HCl in 5 mL of DMF 5 mL was added to the mixture. While reverting to room temperature, the mixture was stirred for 18 hours. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography to give 230 mg (yield 99%) of Fmoc-AzaGly-Leu-OBu^(t). To 187 mg of the product, 10 mL of TFA/H₂O (9/1) was added, followed by stirring for an hour. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and diethyl ether was added to give 143 mg of Fmoc-AzaGly-Leu-OH as the precipitate (yield 87%). The resulting Fmoc-AzaGly-Leu-OH, Trt-Phe was introduced into Fmoc-Arg(Boc₂,Me)Phe-Rink Amide MBHA resin. To the thus prepared Trt-Phe-AzaGly-Leu-Arg(Boc₂,Me)Phe-Rink Amide MBHA resin, 50 mL of TFA/TIS/DCM (Jan. 5, 1994) was added and the mixture was shaken for 50 minutes. After the resin washed and neutralized, Fmoc-Ser(Bu^(t)) and then Fmoc-Asn(Trt) were introduced thereinto. Using 80.3 mg of the resulting Fmoc-Asn(Trt)Ser(Bu^(t))Phe-AzaGly-LeuArg(Boc₂,Me)Phe-Rink Amide MBHA resin, the peptide chain was extended to give 97.2 mg of H-_(D)-Tyr(But)Asn(Trt)Trp(Boc)Asn(Trt)Ser(But)Phe-AzaGly-LeuArg(Boc₂,Me)Phe-Rink Amide MBHA resin.

To the resin obtained, 1 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added, followed by stirring for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 76/24-66/34 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC SH-343-5 S-5, 120A column (20×250 mm). The fractions containing the product were collected and lyophilized to give 11.7 mg of white powders.

Mass spectrum (M+H)⁺ 1317.0 (Calcd. 1317.6)

Elution time on HPLC: 21.0 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 9 Synthesis Process I Preparation of des(1-3)-3-(3-pyridyl)propionyl-[AzaGly7,Arg(Me)9]MS10 (Compound No. 322)

After 48.2 mg of Fmoc-Asn(Trt)Ser(Bu^(t))Phe-AzaGly-LeuArg(Boc₂,Me)Phe-Rink Amide MBHA resin prepared in EXAMPLE 8 was subjected to Fmoc deprotection, the resin was treated with 15.2 mg of 3-(3-pyridyl)propionic acid commercially available, 15.9 μL of DIPCDI and 200 μL of 0.5M HOAt/DMF at room temperature for 90 minutes. After the resin obtained washed and dried, 1 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added to the resin, followed by stirring for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 80/20-60/40 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC SH-343-5 S-5, 120A column (20×250 mm). The fractions containing the product were collected and lyophilized to give 6.0 mg of white powders.

Mass spectrum (M+H)⁺ 987.4 (Calcd. 987.5) Elution time on HPLC: 8.1 min

Elution Conditions:

ColummYMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 10 Synthesis Process J Preparation of des(1-2)-Amidino-[AzaGly7,Arg(Me)9]MS10 (Compound No. 273)

After Fmoc-Trp(Boc) was introduced into 48.2 mg of Fmoc-Asn(Tit)Ser(Bu^(t))Phe-AzaGly-LeuArg(Boc₂,Me)Phe-Rink Amide MBHA resin prepared in EXAMPLE 8, the resin was subjected to Fmoc deprotection to give H-Trp(Boc)Asn(Trt)Ser(Bu^(t))Phe-AzaGly-LeuArg(Boc₂,Me)Phe-Rink Amide MBHA resin. The resin obtained was treated in DMF with 29.3 mg of N,N′-bis-Boc-1-guanylpyrazole and 34.8 μL of DIEA for 14 hours to give Amidino-Trp(Boc)Asn(Trt)Ser(Bu^(t))Phe-AzaGly-LeuArg(Boc₂,Me)Phe-Rink Amide MBHA resin. After the resin obtained washed and dried, 1 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added, followed by stirring for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 78/22-58/42 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC SH-343-5 S-5, 120A column (20×250 mm). The fractions containing the product were collected and lyophilized to give 0.6 mg of white powders.

Mass spectrum (M+H)⁺ 1082.3 (Calcd. 1082.6)

Elution time on HPLC: 11.4 min

Elution Conditions:

Column: YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 11 Synthesis Process K Preparation of [6Ψ7,NHCO,D-Tyr1,Arg(Me)9]MS10 (Compound No. 319)

In 30 mL of MeCN, 5.99 g of Z-Phe was dissolved and 3.94 g of HONB and 4.59 g of WSCD HCl were added to the solution at 0° C., followed by stirring at room temperature for 4 hours. While keeping at 0° C., 3.4 mL of 25% NH₃ aq. solution and 10 mL of DMF were added to the mixture, followed by stirring for 4 hours. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and diethyl ether was added to give 1.48 g (yield 99%) of Z-Phe-NH₂ as the precipitate. After 1.94 g of [Bis(trifluoroacetoxy)iodo]benzene was dissolved in 20 mL of MeCN and 5 mL of H₂O, 890 mg of Z-Phe-NH₂ prepared above and 972 μL of pyridine were added to the precipitate at 0° C., followed by stirring at room temperature for 15 hours. After the solvent was concentrated, the concentrate was subjected to liquid-liquid separation with diethyl ether-1N HCl aq. solution and the 1N HCl aq. solution layer was concentrated and then dried. Its half volume was dissolved in 5 mL of DMF, and 486 μL of mono-tert-butyl malonate and 540 mg of HOBt were added to the solution. Then, 2.08 g of PyBOP and 1394 μL of DIEA were added at 0° C. to the mixture, followed by stirring at room temperature for 15 hours. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography. Diethyl ether-petroleum ether was added to give 304 mg (yield 33%) of Z-PheΨ(NHCO)Gly-OBu^(t) as the precipitate. After 154 mg of the product was dissolved in 20 mL of MeOH, 10% Pd—C was added to the solution, followed by catalytic hydrogenation for 2 hours in a hydrogen flow. After removal of the catalyst by filtration, the solvent was concentrated and dried. The residue was dissolved in 10 mL of MeCN 10 mL and 152 mg of Fmoc-OSu and 78 μL of DIEA were added to the solution, followed by stirring for 15 hours. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and diethyl ether-petroleum ether was added to give 127 mg (yield 68%) of Fmoc-PheΨ(NHCO)Gly-OBu^(t) as the precipitate. Fmoc-Leu was introduced into 63 mg of Fmoc-Arg(Boc₂,Me)Phe-Rink Amide MBHA resin prepared in EXAMPLE 10. After Fmoc deprotection, Fmoc-PheΨ(NHCO)Gly-OH (prepared by treating 25 mg of Fmoc-PheΨ(NHCO)Gly-OBu^(t) with TFA for 3 minutes), 300 μL of 0.5M HOAt, 78 mg of PyAOP and 52 μL of DIEA were added to the resin, followed by shaking for 6 hours. After the resin washed, 2 mL of DMF, 9 μL of DIEA and 12 μL of Ac₂O were added to the resin, followed by shaking for 30 minutes. After the resin washed, the peptide chain was extended on ABI 433A to give Boc-D-Tyr(Bu^(t))Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheΨ(NHCO)GlyLeuArg(Boc₂,Me)P he-Rink Amide MBHA resin. To 34 mg of the product, 200 μL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added, followed by stirring for 2 hours. Ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (30 minutes) was performed with eluants A/B: 76/24-66/34 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 0.7 mg of white powders.

Mass spectrum (M+H)⁺ 1316.3 (Calcd. 1316.7)

Elution time on HPLC: 18.7 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-0/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 12 Synthesis Process L Preparation of [N((CH₂)₃Gn)Gly9]-MS10 (Compound No. 218)

Using 192 mg of Fmoc-Phe-Rink Amide MBHA resin, the peptide chain was extended on ABI 433A to give Fmoc-GlyPhe-Rink Amide MBHA resin. After a 1/4 volume of the product was subjected to Fmoc deprotection, 2 mL of DMF, 50 μL of AcOH, 5 mg of Boc-β-Ala-H and 16 mg of NaBH₃CN were added thereto and the mixture was shaken for 30 minutes. After the resin washed, 71 mg of Fmoc-Leu, 56 mg of CIP, 27 mg of HOAt and 105 mL of DIEA were added, followed by shaking for 15 hours. After the resin washed, the peptide chain was extended on ABI 433A to give Z-Tyr(Bzl)Asn(Trt)Trp(Boc)Asn(Trt)Ser(Bu^(t))PheGlyLeuN((CH₂)₃NHBoc)GlyPhe-Rink Amide MBHA resin. To the product, 1 mL of TFA/PhOH/H₂O/TIS/EDT (87.5/5/2.5/2.5/2.5) was added and the mixture was stirred for 2 hours. After the resin was removed by filtration and then concentrated, ether was added to the concentrate. A half volume of the resulting precipitate was dissolved in 500 μL of DMF, 9 mg of 1H-pyrazole-1-carboxamidine hydrochloride and 22 mL of DIEA were added to the solution, followed by stirring for 15 hours. The solvent was distilled off and ether was added to precipitate. Under ice cooling, 60 μL of PhSMe, 56 μL of m-cresol, 26 μL of EDT, 337 μL of TFA and 65 μL of TMSBr were added to the mixture, followed by stirring for 2 hours. After the solvent was distilled off, ether was added to the residue, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 74/26-64/36 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 1.8 mg of white powders.

Mass spectrum (M+H)⁺ 1302.5 (Calcd. 1302.7)

Elution time on HPLC: 18.6 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (35 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 13 Synthesis Process M Preparation of MS10 (Compound No. 3)

Commercially available p-methyl BHA resin (0.77 mmole/g resin) was charged in a reaction tank of peptide synthesizer ABI 430A. Thereafter, Boc-Phe.Boc-Arg(Tos), Boc-Leu.Boc-Gly, Boc-Phe.Boc-Ser(Bzl), Boc-Asn.Boc-Trp(For) and Boc-Asn.Boc-Tyr(Br-Z) were introduced into the resin in this order according to the Boc-strategy (DCC-HOBt) peptide synthesis to give the desired protected peptide resin. The resin, 0.11 g, was stirred at 0° C. for 60 minutes in 10 ml of anhydrous hydrogen fluoride containing 1 ml of p-cresol and 1.2 ml of 1,4-butanediol. Thereafter the hydrogen fluoride was distilled off in vacuum. Diethyl ether was added to the residue and the precipitate was filtrated. To the precipitate 50% acetic acid aqueous solution was added for extraction and insoluble matters were removed. After the extract was sufficiently concentrated, the concentrate was applied to Sephadex (trade name) G-25 column (2.0×80 cm) filled with 50% acetic acid aqueous solution followed by development with the same solvent. The main fractions were collected and lyophilized to give 40 mg of white powders. A half volume of the powders was applied to column chromatography (2.6×60 cm) packed with LiChroprep (trade name) RP-18 followed by washing with 200 ml of water containing 0.1% TFA. Then linear density gradient elution was performed with 300 ml of 0.1% TFA in water and 300 ml of 0.1% TFA-containing 33% acetonitrile. The main fractions were collected and lyophilized to give 2.2 mg of the desired peptide.

Mass spectrum (M+H) 1302.5 (Calcd. 1302.6)

Elution time on HPLC: 18.7 min

Elution Conditions:

Column: Wakosil-II 5C18T 4.6×100 mm

Eluant: linear density gradient elution with eluants A/B=95/5-45/55, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 14 Synthesis Process N Preparation of des(1-3)-2-(Indol-3-yl)ethylcarbamoyl-[AzaGly7,Arg(Me)9]MS10 (Compound No. 279)

Fmoc-Asn(Trt)Ser(Bu^(t))PheAzaGlyLeuArg(Me,Boc₂)Phe-Rink-Amide MBHA resin prepared in EXAMPLE 8 was subjected to Fmoc deprotection. To 64 mg (20 μmol) of H-Asn(Trt)Ser(Bu^(t))PheAzaGlyLeuArg(Me,Boc₂)Phe-Rink Amide MBHA resin, 1.5 mL of THF and 13 mg of CDI were added, followed by shaking for 2 hours. After 32 mg of tryptamine hydrochloride, 28 μL of DIEA and 500 μL of DMF were added to the mixture, followed by shaking for 24 hours. Thereafter the resin washed to give 2-(Indol-3-yl)ethylcarbamoyl-Asn(Trt)Ser(But)PheAzaGlyLeuArg(Me,Boc₂)Phe-Rink Amied MBHA resin. To 15 mg of the product, 200 μL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added, followed by stirring for 2 hours. Ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 69/31-59/41 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 1.1 mg of white powders.

Mass spectrum (M+H)⁺ 1040.2 (Calcd. 1040.5)

Elution time on HPLC: 20.1 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-0/50, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 15 Preparation of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin

Commercially available Rink Amide MBHA resin, 5 g (0.4 mmol/g), was swollen in DMF, and treated with 50 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained washed with DMF, Trp(Boc) was introduced by treating the resin at room temperature with 4.213 g (8 mmol) of Fmoc-Trp(Boc)-OH, 1.272 mL (8 mmol) of DIPCDI and 16 mL (8 mmol) of 0.5M HOAt/DMF solution for 90 minutes to give Fmoc-Trp(Boc)-Rink Amide MBHA resin. In a similar manner, Orn(Mtt) was introduced to give 2 mmol of Fmoc-Orn(Mtt)-Trp(Boc)-Rink Amide MBHA resin. After the resin obtained washed and swollen with DCM, 50 mL of TFA/TIS/DCM (Jan. 5, 1994) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Mtt group in a TFA/TIS/DCM (Jan. 5, 1994) solution disappeared when the solution was added, thus the Mtt group was removed.

The resulting Fmoc-Orn-Trp(Boc)-Rink Amide MBHA resin was neutralized with 5%-DIEA/DCM solution. After washing with DCM, 25 mL of DCM-TFE (4:1) and 1.946 g (6 mmol) of N-methyl-N,N′-bis-Boc-1-guanylpyrazole obtained in REFERENCE EXAMPLE 1 were added to the resin. DIEA was added to the mixture to adjust pH of the solution to 10, and the mixture was shaken for 15 hours to give 6.195 g of Fmoc-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. Fmoc-Leu was introduced into the obtained resin as in the same manner described above. The resin was divided in half and the Fmoc group was removed from the thus obtained Fmoc-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (1 mmol) to give H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (1 mmol).

Separately, 1.745 g (6 mmol) of Fmoc-NHNH₂HCl was suspended in 20 mL of DMF-THF (4:1). Under ice cooling, 973 mg (6 mmol) of CDI and 2.09 mL (12 mmol) of DIEA were added to the suspension, followed by stirring at room temperature for an hour. The resulting reaction solution was added to H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin described above, followed by stirring at room temperature for 15 hours. After completion of the reaction, the resin washed and dried to give 3.314 g of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

EXAMPLE 16 Synthesis Process O Preparation of des(1)-[D-Tyr2,D-Pya(4)₃,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 385)

After 100 mg (0.03 mmol) of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin was swollen in DMF, the resin was treated with 2 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained washed with DMF, Phe was introduced by treating the resin with 77.5 g (0.2 mmol) of Fmoc-Phe-OH, 31.8 μL (0.2 mmol) of DIPCDI and 0.4 mL (0.2 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes. In a similar manner, Ser(^(t)Bu) and Asn(Trt) were introduced to give Fmoc-Asn(Trt)-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. The obtained resin was subjected to Fmoc deprotection and treated with 77.6 mg (0.2 mmol) of Fmoc-D-Pya(4)-OH, 104.2 mg (0.2 mmol) of PyAOP, 400 μL (0.2 mmol) of 0.5M HOAt/DMF and 174.2 μL (0.2 mmol) of DIEA at room temperature for 90 minutes to introduce _(D)-Pya(4) and then D-Tyr(^(t)Bu), followed by Fmoc deprotection. Thus, 135 mg of H-_(D)-Tyr(^(t)Bu)-D-Pya(4)-Asn(Trt)-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin was obtained.

To the resin obtained, 1 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added, followed by stirring for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated twice for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed at a flow rate of 15 ml/min with eluants A/B: 79/21-69/31 using: 0.1% TFA in water and

eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC Pack R&D-ODS-5-B S-5, 120A column (30×250 mm). The fractions containing the product were collected and lyophilized. The white powders obtained were dissolved in 10 mL of water and 100 μL of ion exchange resin BioRAD AG1×8 AcO⁻ form was added to the solution. While manually stirring the solution sometimes, the reaction solution was settled for an hour. The solution was filtered through a membrane filter to remove the resin and give 6.6 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 1204.5 (Calcd. 1204.6)

Elution time on HPLC: 8.2 min

Elution Conditions:

Column YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 17 Synthesis Process P Preparation of des(1-6)-Dibenzylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 393)

After 35.2 mg (0.015 mmol) of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin was swollen in DMF, the resin was treated with 2 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. Separately, 19.2 μL (0.1 mmol) of dibenzylamine was dissolved in THF. Under ice cooling, 16.2 mg (0.1 mmol) of CDI and 2.6 μL (0.015 mmol) of DIEA were added to the solution, followed by stirring at room temperature for an hour. After Fmoc deprotection, the resulting solution was added to H-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin, followed by stirring at room temperature for 15 hours.

To Bzl₂NCO-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin obtained, 1 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added, and the mixture was stirred for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated twice for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed at a flow rate of 8 ml/min. with eluants A/B: 63/37-53/47 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC SH-343-5 S-5, 120A column (20×250 mm). The fractions containing the product were collected and lyophilized. The white powders obtained were dissolved in 10 mL of water and 100 μL of ion exchange resin BioRAD AG1×8 AcO⁻ form was added to the solution. While manually stirring the solution sometimes, the reaction solution was settled for an hour. The solution was filtered through a membrane filter to remove the resin and give 2.2 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 768.7 (Calcd. 768.4)

Elution time on HPLC: 16.9 min

Elution Conditions:

Column YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 18 Synthesis Process Q Preparation of des(1-5)-Benzoyl-[6Ψ7,CH₂O,Arg(Me)9,Trp10]MS10 (Compound No. 421)

After 1.80 g of Z-Phe was dissolved in 20 mL of MeOH,

73 mg of DMAP and 1.38 g of WSCD HCl were added to the solution at 0° C., followed by stirring at 4° C. for 12 hours. The solvent was concentrated and the concentrate was dissolved in AcOEt. The solution was then washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated to give Z-Phe-OMe as oil. After dissolving in 20 mL of dry THF, 196 mg of LiBH₄ was added to the solution, followed by stirring at room temperature for 15 hours. The solvent was concentrated and the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and ether-petroleum ether was added to the concentrate to give 1.45 g (yield 85%) of Z-Phe-ol as the precipitate. After 60 mg of 60% NaH was suspended in 10 mL of dry THF, 285 mg of Z-Phe-ol, 264 mg of 18-crown-6 and 1.48 mL of tert-butyl bromoacetate were added to the solution at 0° C. While reverting to room temperature, the mixture was stirred for 15 hours. After the solvent was distilled off in vacuum, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography to give 217 mg (yield 54%) of Z-PheΨ(CH₂O)Gly-OBu^(t) as oil. After 160 mg of Z-PheΨ(CH₂O)Gly-OBu^(t) was dissolved in 20 mL of MeOH, 10% Pd—C was added to the solution, followed by catalytic hydrogenation for 3 hours in a nitrogen flow. The catalyst was removed by filtration and the solvent was concentrated followed by drying. The concentrate was dissolved in 15 mL of DCM, and 114 mg of Fmoc-Cl and 139 μL of DIEA were added to the solution, followed by stirring for 12 hours. After the solvent was distilled off, the residue was dissolved in AcOEt and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography. Diethyl ether-petroleum ether was added to give 150 mg (yield 77%) of Fmoc-PheΨ(CH₂O)Gly-OBu^(t) as the precipitate. To the precipitate, were added 31 mg (15 μmol) of H-LeuArg(Me,Boc₂)Trp(Boc)-Rink amide MBHA resin obtained in a manner similar to the process of EXAMPLE 15, 19 mg of Fmoc-PheΨ(CH₂O)Gly-OH (prepared by treating Fmoc-PheΨ(CH₂O)Gly-OBu^(t) with 50% TFA/DCM for an hour), 180 μL of 0.5M HOAt, 42 mg of PyBrop and 47 μL of DIEA. The mixture was shaken for 18 hours. After the resin washed, 5 mL of 20% piperidine/DMF was added to the resin, followed by stirring at room temperature for 30 minutes. After the resin washed, 9 μL of benzoyl chloride, 13 μL of DIEA and 1 mL of DMF 1 were added to the resin, followed by stirring at room temperature for 2 hours. After the resin washed and dried, 200 μL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added to the resin, followed by stirring for 2 hours. Ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 75/25-65/35 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 2.5 mg of white powders. Mass spectrum (M+H)⁺ 782.2 (Calcd. 782.4)

Elution time on HPLC: 22.1 min

Elution Conditions:

Column: Wakosil-115C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-0/50, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 19 Synthesis Process R Preparation of des(1-7)-Dibenzylaminocarbamoylacetyl-[Arg(Me)9,Trp10]MS10 (Compound No. 434)

After 1.54 mL of mono-tert-butyl malonate, 1.08 g of fluorenylmethanol and 61 mg of DMAP were dissolved in 20 mL of DCM 20, 1.15 g of WSCD HCl was added to the solution, followed by stirring at room temperature for 24 hours. The solvent was distilled off in vacuum, the residue was dissolved in AcOEt. The solution was then washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and the concentrate was purified by flush column chromatography to give 1.62 g (yield 96%) of tert-butyl fluorenylmethyl malonate. In 20 mL of TFA, 61 mg of tert-butyl fluorenylmethyl malonate was dissolved and the solution was stirred at room temperature for 2 hours. After the solvent was distilled off in vacuum, the residue was dissolved in AcOEt, followed by washing with satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and purified by flush column chromatography to give 850 mg (yield 67%) of mono-fluorenylmethyl malonate. After 5 mL of 20% piperidine/DMF was added to 46 mg (15 μmol) of Fmoc-LeuArg(Me,Boc₂)Trp(Boc)-Rink amide

MBHA resin prepared in a manner similar to EXAMPLE 15, the solution was shaken at room temperature for 30 minutes. After the resin washed, 42 mg of mono-fluorenylmethyl malonate, 70 mg of PyBrop, 300 μL of 0.5M HOAt/DMF, 52 μL of DIEA and 1 mL of DMF were added to the resin, and the mixture was shaken for 15 hours. After this procedure was repeated twice, 8 μL of Ac₂O, 5 μL of DIEA and 2 mL of DCM were added, followed by stirring at room temperature for 30 minutes. After the resin washed and then dried, 5 mL of 20% piperidine/DMF was added to a half of the resin, followed by stirring at room temperature for 30 minutes. After the resin washed, 13 mg of dibenzylhydrazine, 28 mg of PyBrop, 120 μL of 0.5M HOAt/DMF, 21 μL of DIEA and 1 mL of DMF were added to the resin, followed by shaking for 15 hours. After the resin washed and then dried, 200 μL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added to the resin, followed by stirring for 2 hours. Ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (120 minutes) was performed with eluants A/B: 83/17-63/37 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 21.6 mg of white powders.

Mass spectrum (M+H)⁺ 767.6 (Calcd. 767.4)

Elution time on HPLC: 14.5 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 20 Synthesis Process S Preparation of des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 436)

After 340.1 mg (0.1 mmol) of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin was swollen in DMF, the resin was treated in 20 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. The resin obtained washed with DMF and treated with 155.0 mg (0.4 mmol) of Fmoc-Phe-OH, 63.6 μL (0.4 mmol) of DIPCDI and 0.8 mL (0.4 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes to introduce Phe. After Fmoc-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin obtained was subjected to Fmoc deprotection and then treated with 49.2 mg (0.4 mmol) of 4-Pyridinecarboxylic acid, 63.6 μL (0.4 mmol) of DIPCDI and 0.8 mL (0.4 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes. Then, the resin washed and dried to give 353.5 mg of 4-Pyridinecarbonyl-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. To the resulting resin, 3.5 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added and the mixture was stirred for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated twice for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed at a flow rate of 15 ml/min with eluants A/B: 79/21-69/31 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC Pack R&D-ODS-5-B S-5, 120A column (30×250 mm). The fractions containing the product were collected and lyophilized. The white powders obtained were dissolved in 6 mL of water and 200 μL of ion exchange resin BioRAD AG1×8 AcO⁻ form was added to the solution. While manually stirring the solution sometimes, the reaction solution was settled for an hour. The solution was filtered through a membrane filter to remove the resin and give 21.6 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 797.8 (Calcd. 797.4)

Elution time on HPLC: 8.8 min

Elution Conditions:

Column YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 21 Synthesis Process T Preparation of des(1-3)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 499)

After 170.1 mg (0.05 mmol) of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin was swollen in DMF, the resin was treated with 5 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. The resin obtained washed with DMF and treated with 77.5 mg (0.2 mmol) of Fmoc-Phe-OH, 31.8 μL (0.2 mmol) of DIPCDI, and 0.4 mL (0.2 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes to introduce Phe. In a similar manner, Ser(^(t)Bu) and Asn(Trt) were introduced to give Fmoc-Asn(Trt)-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide

MBHA resin. The resin obtained was subjected to Fmoc deprotection and then treated with 30.0 mg (0.2 mmol) of phenylpropionic acid, 31.8 μL (0.2 mmol) of DIPCDI and 0.4 mL (0.2 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes. Then, the resin washed and dried to give 209.6 mg of 3-Phenylpropionyl-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. To the resin obtained, 1.5 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added and the mixture was stirred for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated twice for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed at a flow rate of 8 ml/min with eluants A/B: 71/29-61/39 using: 0.1% TFA in water and

eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC SH-343-5 S-5, 120A column (20×250 mm). The fractions containing the product were collected and lyophilized. The white powders obtained were dissolved in 10 mL of water and 125 μL of ion exchange resin BioRAD AG1×8 AcO⁻ form was added to the solution. While manually stirring the solution sometimes, the reaction solution was settled for an hour. The solution was filtered through a membrane filter to remove the resin and give 5.2 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 1025.3 (Calcd. 1025.5)

Elution time on HPLC: 13.6 min

Elution Conditions:

Column YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 22 Synthesis Process U Preparation of des(1-5)-Benzoyl-[AzaPhe6,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 431)

After 500 mg (2.56 mmol) of benzylhidrazine.2HCl was dissolved in DCM, the solution was cooled to −78° C. on dry ice. Then, 727.1 mg (3.33 mmol) of Boc₂O and 0.982 ml (5.64 mmol) of DIEA were added to the solution. Dry ice was removed and the mixture was stirred for 30 minutes. After confirming by TLC that the reaction proceeded, 327 μl (2.82 mmol) of benzoyl chloride and 580.4 μl (3.33 mmol) of DIEA were added to the mixture, followed by stirring at room temperature overnight. Citric acid crystals were added to the reaction solution and the mixture was concentrated. A 10% citric acid aqueous solution was added to the mixture. The precipitated residue was extracted with AcOEt and the extract washed with 10% citric acid aqueous solution, 5% NaHCO₃ aq. solution and then satd. NaCl aq. solution, followed by drying over anhydrous Na₂SO₄. The residue obtained was crystallized from ether-hexane (1:1) to give 435.5 mg of white crystals.

After 46.3 mg (0.015 mmol) of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-NH-Rink Amide MBHA resin was swollen in DMF, the resin was treated with 5 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. The resin obtained washed with DMF and treated in THF with 3.65 mg (0.023 mmol) of CDI at room temperature for an hour. Separately, 32.6 mg (0.1 mmol) of the white powders above were treated with 0.3 ml of 4N HCl/dioxane for an hour. The solvent was then distilled off and the residue washed with ether. The residue obtained was dissolved in THF, and 17.4 μl (0.1 mmol) of DIEA was added to the solution. The resulting solution was added to the resin, followed by stirring overnight. The resin washed and dried to give 29.5 mg of Benzoyl-AzaPhe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-NH-Rink Amide MBHA resin. To the resin obtained,

0.5 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added and the mixture was stirred for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated twice for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed at a flow rate of 8 ml/min with eluants A/B: 66/34-56/44 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC SH-343-5 S-5, 120A column (20×250 mm). The fractions containing the product were collected and lyophilized to give 3.2 mg of white powders.

Mass spectrum (M+H)⁺ 797.7 (Calcd. 797.4)

Elution time on HPLC: 15.3 min

Elution Conditions:

Column YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 23 Synthesis Process V Preparation of des(1)-[D-Tyr2,D-Pya(4)₃,AzaGly7,Arg(Me)9,10Ψ,CSNH]MS10 (Compound No. 548)

Fmoc-Leu-OH was introduced into commercially available 2-chlorotritylchloride resin. After Fmoc deprotection, 5 mL of THF and 162 mg of CDI were added to 403 mg of Fmoc-Leu-O-Clt resin (sub. 0.62 mmol/g) obtained. The mixture was shaken for an hour. After 97 μL of hydrazine monohydrate was added to the system, the mixture was shaken for 2 hours and the resin was then washed. To the resin, 581 mg of Fmoc-Phe, 699 mg of PyBrop, 3 mL of 0.5M HOAt/DMF solution and 784 μL of DIEA were added, followed by shaking for 12 hours. After the resin washed, the peptide chain was extended on ABI 433A to give 0.47 g of Boc-D-Tyr(Bu^(t))D-Pya(4)Asn(Trt)Ser(Bu^(t))PheAzaGlyLeu-O-Clt resin. To the resin, 10 mL of AcOH/TFE/DCM (1/1/8) was added, followed by shaking for 30 minutes. The resin was removed by filtration and the solvent was concentrated. The residue was dissolved in chloroform and the resulting solution washed with satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated and AcOEt-diethyl ether was added to the concentrate to give 320 mg (yield 98%) of Boc-D-Tyr(Bu^(t))D-Pya(4)Asn(Trt)Ser(Bu^(t))PheAzaGlyLeu-OH as the precipitate. On the other hand, 5 mL of 4N HCl/AcOEt was added to 264 mg (1 mmol) of Boc-Phe-NH₂ under ice cooling, followed by stirring for 30 minutes. The solvent was distilled off and ether was then added for precipitation. The precipitate was dissolved in 20 mL of DMF, and 455 mg of Fmoc-Orn(Boc), 540 mg of HOBt, 382 mg of WSCD.HCl and 348 μL of DIEA were added to the solution, followed by stirring for 6 hours. After the solvent was distilled off in vacuum, the residue was dissolved in ethyl acetate and the solution washed with 1N HCl aq. solution, satd. NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated. Ether-petroleum ether was added to the concentrate to give 594.4 mg (yield 99%) of Fmoc-Orn(Boc)-Phe-NH₂ as the precipitate. Under ice cooling, 5 mL of 4N HCl/AcOEt was added to 132 mg of the product, followed by stirring for 30 minutes. After the solvent was distilled off, ether was added to give 111.1 mg (yield 94%) of Fmoc-Orn-Phe-NH₂.HCl as the precipitate. The precipitate was dissolved in 3 mL of chloroform/TFE (3/1), and 194 mg of N-methyl-N,N′-Bis-Boc-1-guanylpyrazole obtained in REFERENCE EXAMPLE 1 and 105 μL of DIEA were added to the solution, followed by stirring for 24 hours. After the solvent was distilled off, ether-petroleum ether was added to give 108.5 mg (yield 72%) of Fmoc-Arg(Boc₂,Me)-Phe-NH₂ as the precipitate. In 5 mL of THF, 38 mg of the product was dissolved and 142 mg of Lawesson's Reagent was added to the solution, followed by stirring for 15 hours. After the solvent was distilled off in vacuum, the residue was dissolved in ethyl acetate and the solution washed with NaHCO₃ aq. solution and then satd. NaCl aq. solution. After drying over Na₂SO₄, the solvent was concentrated. After purification by flush column chromatography, ether-petroleum ether was added to give 18.7 mg (yield 48%) of Fmoc-Arg(Me,Boc₂)-PheΨ(CSNH)—NH₂ as the precipitate. To 11 mg of the product, 1 mL of 10% DEA/DMF was added and the mixture was stirred for 2 hours. After the solvent was distilled off, the residue was dissolved in 1 mL of DMF, and 18 mg of Boc-D-Tyr(Bu^(t))-D-Pya(4)-Asn(Trt)-Ser(Bu^(t))-Phe-AzaGly-Leu-OH previously obtained, 7.6 mg of HOBt, 5.4 mg of WSCD.HCl and 4.9 μL of DIEA were added to the solution, followed by stirring for 15 hours. The solvent was distilled off and ether was added to the residue for precipitation. To the precipitate, 1 mL of TFA/PhSMe/m-cresol/TIS/EDT (85/5/5/2.5/2.5) was added, and the mixture was stirred for 2 hours. Ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated for washing. The residue was extracted with an aqueous acetic acid solution and the extract was filtered to remove the resin. Then, linear density gradient elution (60 minutes) was performed with eluants A/B: 82/18-72/28 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC D-ODS-5-ST S-5 120A column (20×150 mm). The fractions containing the product were collected and lyophilized to give 0.9 mg of white powders.

Mass spectrum (M+H)⁺ 1181.5 (Calcd. 1181.6)

Elution time on HPLC: 14.9 min

Elution Conditions:

Column: Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-0150, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 24 Synthesis Process W Preparation of Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 550)

After 5 g (0.4 mmol/g) of commercially available Rink Amide MBHA resin was swollen in DMF, the resin was treated with 50 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained washed with DMF, Trp(Boc) was introduced by treating the resin with 4.213 g (8 mmol) of Fmoc-Trp(Boc)-OH, 1.272 mL (8 mmol) of DIPCDI and 16 mL (8 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes. In a similar manner, Orn(Mtt) was introduced to give 2 mmol of Fmoc-Orn(Mtt)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained washed with DCM, after swelling, 50 mL of TFA/TIS/TFE/DCM (1/5/19/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Mtt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Mtt group was removed.

The resulting Fmoc-Orn-Trp(Boc)-Rink Amide MBHA resin was neutralized with 5%-DIEA/DCM solution. After washing with DCM, 25 mL of DCM-TFE (4:1) and 1.946 g (6 mmol) of N-methyl-N,N′-bis-Boc-1-guanylpyrazole obtained in REFERENCE EXAMPLE 1 were added to the resin. DIEA was added to the mixture to adjust pH of the solution to 10, and the mixture was shaken for 15 hours to give Fmoc-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. Fmoc-Leu was introduced into the obtained resin as in the same manner described above. The Fmoc group was removed from the thus obtained Fmoc-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (2 mmol) to give H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (2 mmol).

Separately, 2.326 g (8 mmol) of Fmoc-NHNH₂.HCl was suspended in 20 mL of DMF. Under ice cooling, a suspension of 297 mg (8 mmol) of CDI in 20 mL of THF and then 2.787 mL (16 mmol) of DIEA was added to the suspension, followed by stirring at room temperature for an hour. The resulting reaction solution was added to H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin described above, followed by stirring at room temperature for 15 hours. After completion of the reaction, the resin washed and dried to give 6.394 g of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

After 3.197 g (1 mmol) of the resin obtained was swollen in DMF, the resin was treated with 30 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained washed with DMF, the resin was treated with 1.806 g (4 mmol) of Trt-Phe-OH.0.5AcOEt, 2.086 g (4 mmol) of PyAOP, 8 mL (4 mmol) of 0.5M HOAt/DMF and 2.787 mL (16 mmol) of DIEA at room temperature for 90 minutes to give Trt-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin Phe. The resin obtained washed with DCM, after swelling, 30 mL of TFA/TIS/TFE/DCM (1/5/19/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Trt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Trt group was removed. The H-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin obtained was neutralized with 5%-DIEA/DMF solution and washed with DMF. Thereafter, the resin was treated with 1.590 g (4 mmol) of Fmoc-Thr(^(t)Bu)-OH, 0.636 mL (4 mmol) of DIPCDI and 8 mL (4 mmol) of 0.5M HOAt/DMF at room temperature for 90 minutes to introduce Thr(^(t)Bu). Subsequently, the Fmoc deprotection by treatment with 30 ml of 20% piperidine/DMF solution for 20 minutes and condensation by the DIPCDI/HOAt method similar to introduction of Thr(^(t)Bu) were repeated so that Asn(Trt), _(D)-Trp(Boc), and _(D)-Tyr(^(t)Bu) were introduced to give Fmoc-_(D)-Tyr(BU)-D-Trp(Boc)-Asn(Trt)-Thr(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was treated with 30 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. The resin obtained washed to give H-_(D)-Tyr(^(t)Bu)-D-Trp(Boc)-Asn(Trt)-Thr(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was treated with 188.7 μL (2 mmol) of Ac₂O and 348.4 μL (2 mmol) of DIEAin 20 mL of DMF at room temperature for 30 minutes to acetylate the N terminus. The resin was then washed and dried to give 4.168 g of Ac-_(D)-Tyr(^(t)Bu)-D-Trp(Boc)-Asn(Trt)-Thr(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

To a half of the resin obtained, i.e., 2.111 g, 15 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added and the mixture was stirred for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated twice for washing. After the residue was extracted with an aqueous acetic acid solution, the extract was filtered to remove the resin and lyophilized to give crude peptide powders. With respect to the remaining half of the resin, deprotection was performed under the same conditions to give about 650 mg of crude peptide powders in total. About 50 mg each of the crude peptide obtained was purified by applying sequentially to linear density gradient elution (60 minutes) at a flow rate of 15 ml/min with eluants A/B: 71/29-61/39 using: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile on preparative HPLC using YMC Pack R&D-ODS-5-B S-5, 120A column (30×250 mm). The fractions containing the product were collected and lyophilized to give 255.5 mg of white powders as the purified sample.

All of the white powders were dissolved in 200 mL of aqueous acetonitrile solution and 492 μL of ion exchange resin AG1×8 AcO⁻ form, which was obtained by converting commercially available BioRAD AG1×8 Cl⁻ form into the acetate type in a conventional manner, was added to the solution. While manually stirring the reaction solution sometimes, the reaction solution was settled for an hour. The solution was concentrated to remove acetonitrile as much as possible. The concentrate was then filtered through a membrane filter and lyophilized to give 225.3 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 1298.7 (Calcd. 1298.6)

Elution time on HPLC: 15.6 min

Elution Conditions:

Column YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 25 Preparation of Ac-des(1)-[D-Tyr2,D-Pya(4)₃,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 562)

After 5.455 g (0.455 mmol/g) of commercially available Rink Amide MBHA resin was swollen in DMF, the resin was treated with 50 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained was washed with DMF, Trp(Boc) was introduced by treating the resin with 6.319 g (12 mmol) of Fmoc-Trp(Boc)-OH, 1.908 mL (12 mmol) of DIPCDI and 24 mL (12 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes to give Fmoc-Trp(Boc)-Rink Amide MBHA resin. In a similar manner, Orn(Mtt) was introduced to give 3 mmol of Fmoc-Orn(Mtt)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was washed with DCM, after swelling, 75 mL of TFA/TIS/TFE/DCM (1/5/19/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Mtt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Mtt group was removed.

The resulting Fmoc-Orn-Trp(Boc)-Rink Amide MBHA resin was neutralized with 5%-DIEA/DCM solution. After washing with DCM, 40 mL of DCM-TFE (4:1) and 2.919 g (9 mmol) of N-methyl-N,N′-bis-Boc-1-guanylpyrazole obtained in REFERENCE EXAMPLE 1 were added to the resin. DIEA was added to the mixture to adjust pH of the solution to 10, and the mixture was shaken for 15 hours to give Fmoc-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. Fmoc-Leu was introduced into the obtained resin as in the same manner described above. The Fmoc group was removed from the thus obtained Fmoc-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide

MBHA resin (2 mmol) to give H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (2 mmol).

Separately, 3.489 g (12 mmol) of Fmoc-NHNH₂.HCl was suspended in 30 mL of DMF. Under ice cooling, a suspension of 1.849 mg (11.4 mmol) of CDI in 20 mL of THF and then 4.181 mL (24 mmol) of DIEA was added to the suspension, followed by stirring at room temperature for an hour. The resulting reaction solution was added to H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin described above, followed by stirring at room temperature for 15 hours. After completion of the reaction, the resin washed and dried to give 8.2496 g of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

After 2.646 g (1 mmol) of the resin obtained was swollen in DMF, the resin was treated with 30 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained was washed with DMF, the resin was treated with 1.630 g (4 mmol) of Trt-Phe-OH, 2.086 g (4 mmol) of PyAOP, 8 mL (4 mmol) of 0.5M HOAt/DMF and 2.787 mL (16 mmol) of DIEA at room temperature for 90 minutes to give Trt-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin Phe. The resin obtained was washed with DCM, after swelling, 30 mL of TFA/TIS/TFE/DCM (1/5/19/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Trt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Trt group was removed. The H-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin obtained was neutralized with 5%-DIEA/DMF solution and washed with DMF. Thereafter, the resin was treated with 1.590 g (4 mmol) of Fmoc-Thr(^(t)Bu)-OH, 0.636 mL (4 mmol) of DIPCDI and 8 mL (4 mmol) of 0.5M HOAt/DMF at room temperature for 90 minutes to introduce Thr(^(t)Bu). Subsequently, the Fmoc deprotection by treatment with 30 ml of 20% piperidine/DMF solution for 20 minutes and condensation by the DIPCDI/HOAt method similar to introduction of Thr(^(t)Bu) were performed to give Fmoc-Asn(Trt)-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide

MBHA resin. The resin obtained was Fmoc-deprotected. Then the resin was treated with 1.476 g (3.8 mmol) of Fmoc-_(D)-Pya(4)-OH, 2.086 mg (4 mmol) of PyAOP, 8 mL of 0.5 M HOAt/DMF (4 mmol) and 2.439 mL of DIEA (14 mmol) at room temperature for 90 minutes to introduce _(D)-Pya(4). Subsequently, by the DIPCDI/HOAt method similar to introduction of Thr(^(t)Bu), _(D)-Tyr(^(t)Bu) was introduced to the resin to give Fmoc-_(D)-Tyr(^(t)Bu)-_(D)-Pya(4)-Asn(Trt)-Thr(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was treated with 30 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. The resin obtained was washed to give H-_(D)-Tyr(^(t)Bu)-_(D)-Pya(4)-Asn(Trt)-Thr(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was treated with 188.7 μL (2 mmol) of Ac₂O and 348.4 μL (2 mmol) of DIEA in 20 mL of DMF at room temperature for 30 minutes to acetylate the N terminus. The resin was then washed and dried to give 1 mmol of Ac-_(D)-Tyr(BU)-_(D)-Pya(4)-Asn(Trt)-Thr(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

To the resin obtained, 30 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added and the mixture was stirred for 90 minutes. Diethyl ether was added to the reaction solution, the resulting precipitate was centrifuged and the supernatant was removed. This procedure was repeated twice for washing. After the residue was extracted with an aqueous acetic acid solution, the extract was filtered to remove the resin and lyophilized to give 949.0 mg of crude peptide powders. About 50 mg each of the crude peptide obtained was purified by applying to preparative HPLC using YMC Pack R&D-ODS-5-B S-5, 120A column (30×250 mm) at a flow rate of 15 ml/min sequentially with initial eluants A/B: 90/10 for 8 minutes, A/B: 75/25, wherein it took 7 minutes to increase the concentration, and linear density gradient elution (60 minutes) with eluants A/B: 75/25-65/35 using eluant A: 0.05% TFA in water and eluant B: 0.05% TFA-containing acetonitrile. The fractions containing the product were collected and lyophilized to give 361.1 mg of white powders as the purified sample.

All of the white powders obtained were dissolved in 200 mL of aqueous acetonitrile solution and 1.434 mL of ion exchange resin AG1×8 AcO⁻ form, which was obtained by converting commercially available BioRAD AG1×8 Cl⁻ form into the acetate type in a conventional manner, was added to the solution. While manually stirring the reaction solution sometimes, the reaction solution was settled for an hour. The solution was concentrated to remove acetonitrile as much as possible. The concentrate was then filtered through a membrane filter and lyophilized to give 309.3 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 1260.4 (Calcd. 1260.4)

Elution time on HPLC: 15.5 min

Elution Conditions:

Column Wakosil-II 5C18 HG (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-50/50, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA as eluant B (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 26 Preparation of Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9]MS10 (Compound No. 571)

After 2.5 g (0.4 mmol/g) of commercially available Rink Amide MBHA resin was swollen in DMF, the resin was treated with 50 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained was washed with DMF, Phe was introduced by treating the resin with 1.550 g (4 mmol) of Fmoc-Phe-OH, 0.636 mL (4 mmol) of DIPCDI and 8 mL (4 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes to give Fmoc-Phe-Rink Amide MBHA resin. In a similar manner, Orn(Mtt) was introduced to give 1 mmol of Fmoc-Orn(Mtt)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was washed with DCM, after swelling, 25 mL of TFA/TIS/TFE/DCM (1/5/19/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Mtt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Mtt group was removed.

The resulting Fmoc-Orn-Phe-Rink Amide MBHA resin was neutralized with 5%-DIEA/DCM solution. After washing with DCM, 25 mL of DCM-TFE (4:1) and 0.973 g (3 mmol) of N-methyl-N,N′-bis-Boc-1-guanylpyrazole obtained in REFERENCE EXAMPLE 1 were added to the resin. DIEA was added to the mixture to adjust pH of the solution to 10, and the mixture was shaken for 15 hours to give Fmoc-Arg(Boc₂,Me)-Phe-Rink Amide MBHA resin. Fmoc-Leu was introduced into the obtained resin as in the same manner described above. The Fmoc group was removed from the thus obtained Fmoc-Leu-Arg(Boc₂,Me)-Phe-Rink Amide MBHA resin (1 mmol) to give H-Leu-Arg(Boc₂,Me)-Phe-Rink Amide MBHA resin (1 mmol).

Separately, 1.163 g (4 mmol) of Fmoc-NHNH₂.HCl was suspended in 10 mL of DMF. Under ice cooling, a suspension of 0.568 mg (3.5 mmol) of CDI in 10 mL of THF and then 1.307 mL (7.5 mmol) of DIEA was added to the suspension, followed by stirring at room temperature for an hour. The resulting reaction solution was added to H-Leu-Arg(Boc₂,Me)-Phe-Rink Amide MBHA resin described above, followed by stirring at room temperature for 15 hours. After completion of the reaction, the resin washed and dried to give 3.134 g of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Phe-Rink Amide

MBHA resin.

Using this resin, 1.94 g of Trt-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin obtained by the condensation of Trt-Phe-OH 0.5AcOEt in similar to EXAMPLE 24, was washed with DCM. After swelling, 12 mL of TFA/TIS/TFE/DCM (1/5/19/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until brownish yellow coloration caused by free Trt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Trt group was removed. By washing the resin, 1.66 g of H-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Phe-Rink Amide MBHA resin were obtained. Using 553 mg of the resin obtained, peptide chain was extended with the peptide synthesizer ABI-433A (Fmoc/DCC/HOBt) to give H-D-Tyr(But)-D-Trp(Boc)-Asn(Trt)-Thr(But)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Phe-Rink amide MBHA resin. To this product, 5 mL of DMF, 111 mg of AcONB and 44 ml of DIEA was added and the resin was shaken for two hours. The resin was dried after washing to give 0.78 g of Ac-D-Tyr(But)-D-Trp(Boc)-Asn(Trt)-Thr(But)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Phe-R ink amide MBHA resin. To the resin, 6 mL of TFA/thioanisole/m-cresol/H₂O/TIS/EDT (80/5/5/5/2.5/2.5) was added and the resin was shaken for two hours. After removal of the resin by filtration, solvent was distilled off. By adding diethylether, precipitation was obtained. After centrifugation, washing by removal of the supernatant was repeated twice, and the residues were extracted with acetate solution. After the resin was removed by filtration, the fraction was purified by applying to preparative HPLC using YMC Pack R&D-ODS-5-B S-5, 120A column (30×250 mm) at a flow rate of 15 ml/min sequentially with linear density gradient elution (60 minutes) with eluants A/B: 71/29-61/39 using eluant A: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile. The fractions containing the product were collected and lyophilized to give white powders as the purified sample. The purified sample was lyophilized. The crude peptide obtained in the similar manner using 553 mg of H-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Phe-Rink amide MBHA resin was purified on preparative HPLC to give total 237.6 mg of purified sample as white powders.

The white powders obtained, 236.1 mg were dissolved in 200 mL of aqueous acetonitrile solution and 935 μL of ion exchange resin AG1×8 AcO⁻ form, which was obtained by converting commercially available BioRAD AG1×8 Cl⁻ form into the acetate type in a conventional manner, was added to the solution. While manually stirring the reaction solution sometimes, the reaction solution was settled for an hour. The solution was concentrated to remove acetonitrile as much as possible. The concentrate was then filtered through a membrane filter and lyophilized to give 204.6 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 1259.5 (Calcd. 1259.6)

Elution time on HPLC: 13.2 min

Elution Conditions:

Column YMC-AM301 (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=80/20-30/70, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA as eluant B (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 27 Preparation of Ac-des(1)-[D-Tyr2,D-Trp3,Alb4,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 579)

After 5 g (0.4 mmol/g) of commercially available Rink Amide MBHA resin was swollen in DMF, the resin was treated with 50 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained was washed with DMF, Trp(Boc) was introduced by treating the resin with 4.213 g (8 mmol) of Fmoc-Trp(Boc)-OH, 1.272 mL (8 mmol) of DIPCDI and 16 mL (8 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes to give Fmoc-Trp(Boc)-Rink Amide MBHA resin. In a similar manner, Orn(Mtt) was introduced to give 2 mmol of Fmoc-Orn(Mtt)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was washed with DCM, after swelling, 50 mL of TFA/TIS/TFE/DCM (1/5/19/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Mtt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Mtt group was removed.

The resulting Fmoc-Orn-Trp(Boc)-Rink Amide MBHA resin was neutralized with 5%-DIEA/DCM solution. After washing with DCM, 25 mL of DCM-TFE (4:1) and 1.946 g (6 mmol) of N-methyl-N,N′-bis-Boc-1-guanylpyrazole obtained in REFERENCE EXAMPLE 1 were added to the resin. DIEA was added to the mixture to adjust pH of the solution to 10, and the mixture was shaken for 15 hours to give Fmoc-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. Fmoc-Leu was introduced into the obtained resin as in the same manner described above. The Fmoc group was removed from the thus obtained Fmoc-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (2 mmol) to give H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (2 mmol).

Separately, 2.326 g (8 mmol) of Fmoc-NHNH₂.HCl was suspended in 20 mL of DMF. Under ice cooling, a suspension of 1.297 mg (8 mmol) of CDI in 20 mL of THF and then 2.787 mL (16 mmol) of DIEA was added to the suspension, followed by stirring at room temperature for an hour. The resulting reaction solution was added to H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin described above, followed by stirring at room temperature for 15 hours. After completion of the reaction, the resin washed and dried to give 2 mmol of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

Using 868 mg (0.257 mmol) of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin, Thr(^(t)Bu), Alb, _(D)-Trp(Boc), and _(D)-Tyr(^(t)Bu) were introduced by repeating condensation using DCC/HOBt method with ABI 433A to give a H-_(D)-Tyr(BU)-_(D)-Trp(Boc)-Alb-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. N-terminus od the obtained resin was acetylated by treating with 111 mg (0.5 mmol) of AcONB and 87 μL (0.5 mmol) of DIEA in 5 mL of DMF at room temperature for 10 hours. Subsequently, the resin was washed and dried to give a Ac-_(D)-Tyr(^(t)Bu)-_(D)-Trp(Boc)-Alb-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

To the resin obtained, 6 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT(80/5/5/5/2.5/2.5) was added, and the suspension was shaken for two hours. After removal of the resin by filtration, solvent was distilled off. By adding diethylether, precipitation was obtained. After centrifugation, washing by removal of the supernatant was repeated twice, and the residues were extracted with acetate solution. After the resin was removed by filtration, the fraction was purified by applying to preparative HPLC using YMC Pack R&D-ODS-5-B S-5, 120A column (30×250 mm) at a flow rate of 15 ml/min sequentially with linear density gradient elution (60 minutes) with eluants A/B: 69/31-59/41 using eluant A: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile. The fractions containing the product were collected and lyophilized to give 106.5 mg of white powders as the purified sample.

All the white powders obtained were dissolved in 100 mL of aqueous acetonitrile solution and 400 μL of ion exchange resin AG1×8 AcO⁻ form, which was obtained by converting commercially available BioRAD AG1×8 Cl⁻ form into the acetate type in a conventional manner, was added to the solution. While manually stirring the reaction solution sometimes, the reaction solution was settled for an hour. The solution was concentrated to remove acetonitrile as much as possible. The concentrate was then filtered through a membrane filter and lyophilized to give 97.5 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 1299.5 (Calcd. 1299.6)

Elution time on HPLC: 19.0 min

Elution Conditions:

Column Wakosil-II (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-50/50, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA as eluant B (25 mins.)

Flow rate: 1.0 ml/min.

EXAMPLE 28 Synthesis Process X Preparation of Ac-des(1)-[D-Tyr2,D-Trp3,Dap(For)₄,AzaGly7,Arg(Me)9,Trp10]MS10 (Compound No. 585)

After 5 g (0.4 mmol/g) of commercially available Rink Amide MBHA resin was swollen in DMF, the resin was treated with 50 ml of 20% piperidine/DMF solution for 20 minutes to remove the Fmoc group. After the resin obtained was washed with DMF, Trp(Boc) was introduced by treating the resin with 4.213 g (8 mmol) of Fmoc-Trp(Boc)-OH, 1.272 mL (8 mmol) of DIPCDI and 16 mL (8 mmol) of 0.5M HOAt/DMF solution at room temperature for 90 minutes to give Fmoc-Trp(Boc)-Rink Amide MBHA resin. In a similar manner, Orn(Mtt) was introduced to give 2 mmol of Fmoc-Orn(Mtt)-Trp(Boc)-Rink Amide MBHA resin. The resin obtained was washed with DCM, after swelling, 50 mL of TFA/TIS/TFE/DCM (1/5119/75) was added, the mixture was shaken for 10 minutes and the solution was distilled off. This procedure was repeated until yellow coloration caused by free Mtt group in a TFA/TIS/TFE/DCM (1/5/19/75) solution disappeared when the solution was added, thus the Mtt group was removed.

The resulting Fmoc-Orn-Trp(Boc)-Rink Amide MBHA resin was neutralized with 5%-DIEA/DCM solution. After washing with DCM, 25 mL of DCM-TFE (4:1) and 1.946 g (6 mmol) of N-methyl-N,N′-bis-Boc-1-guanylpyrazole obtained in REFERENCE EXAMPLE 1 were added to the resin. DIEA was added to the mixture to adjust pH of the solution to 10, and the mixture was shaken for 15 hours to give Fmoc-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. Fmoc-Leu was introduced into the obtained resin as in the same manner described above. The Fmoc group was removed from the thus obtained Fmoc-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (2 mmol) to give H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin (2 mmol).

Separately, 2.326 g (8 mmol) of Fmoc-NHNH₂.HCl was suspended in 20 mL of DMF. Under ice cooling, a suspension of 1.297 mg (8 mmol) of CDI in 20 mL of THF and then 2.787 mL (16 mmol) of DIEA was added to the suspension, followed by stirring at room temperature for an hour. The resulting reaction solution was added to H-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin described above, followed by stirring at room temperature for 15 hours. After completion of the reaction, the resin washed and dried to give 2 mmol of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

Using 868 mg (0.257 mmol) of Fmoc-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin, Thr(^(t)Bu), Dap(Mtt), _(D)-Trp(Boc) and _(D)-Tyr(^(t)Bu) were introduced by repeating condensation using DCC/HOBt method with ABI 433A to give a H-_(D)-Tyr(BU)-_(D)-Trp(Boc)-Dap(Mtt)-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin. N-terminus od the obtained resin was acetylated by treating with 111 mg (0.5 mmol) of AcONB and 87 μL (0.5 mmol) of DIEA in 5 mL of DMF at room temperature for 4 hours. Subsequently, the resin was washed and dried to give a Ac-_(D)-Tyr(^(t)Bu)-_(D)-Trp(Boc)-Dap(Mtt)-Ser(^(t)Bu)-Phe-AzaGly-Leu-Arg(Boc₂,Me)-Trp(Boc)-Rink Amide MBHA resin.

To the resin obtained, 6 mL of TFA/PhSMe/m-cresol/H₂O/TIS/EDT(80/5/5/5/2.5/2.5) was added, and the suspension was shaken for two hours. After removal of the resin by filtration, solvent was distilled off. By adding diethylether, precipitation was obtained. After centrifugation, washing by removal of the supernatant was repeated twice, and the residues were extracted with acetate solution. After the resin was removed by filtration, the fraction was purified by applying to preparative HPLC using YMC Pack R&D-ODS-5-B S-5, 120A column (30×250 mm) at a flow rate of 15 ml/min sequentially with linear density gradient elution (60 minutes) with eluants A/B: 71/29-61/39 using eluant A: 0.1% TFA in water and eluant B: 0.1% TFA-containing acetonitrile. The fractions containing the product were collected and lyophilized to give 106.5 mg of white powders as the purified sample.

All the white powders obtained were dissolved in 100 mL of aqueous acetonitrile solution and 400 μL of ion exchange resin AG1×8 AcO⁻ form, which was obtained by converting commercially available BioRAD AG1×8 Cl⁻ form into the acetate type in a conventional manner, was added to the solution. While manually stirring the reaction solution sometimes, the reaction solution was settled for an hour. The solution was concentrated to remove acetonitrile as much as possible. The concentrate was then filtered through a membrane filter and lyophilized to give 58.3 mg of white powders as the acetate.

Mass spectrum (M+H)⁺ 1284.7 (Calcd. 1284.6)

Elution time on HPLC: 17.9 min

Elution Conditions:

Column Wakosil-II (4.6×100 mm)

Eluant: linear density gradient elution with eluants A/B=100/0-50/50, using 0.1% TFA in water as eluant A and acetonitrile containing 0.1% TFA as eluant B (25 mins.)

Flow rate: 1.0 ml/min.

The structures of compounds synthesized as in EXAMPLES 1 to 24 and physicochemical properties of these compounds are shown in TABLES 1 to 11, below.

TABLE 1 Comp. HPLC HPLC Synth No. M + H+ (obs.) M + H+ (cal.) (min.) mode Proc 1 Metastin 5858.4 5858.5 18.1 d M 2 Lys-Asp-Leu-Pro-Asn-MS10 1869.6 1869.9 18.6 d M 3 MS10 1302.5 1302.6 18.7 d M 4 des(1)-MS10 1139.6 1139.6 18.1 d M 17 [Pya(4)10]MS10 1303.6 1303.6 14.7 d M 18 [Tyr(Me)10]MS10 1332.7 1332.7 17.7 d M 19 [Phe(2F)10]MS10 1320.5 1320.6 17.8 d M 23 [Tyr5]MS10 1378.6 1378.8 18.6 d M 24 [Leu5]MS10 1328.7 1328.7 19.8 d M 30 Acetyl-MS10 1344.5 1344.6 29.2 b A 31 Fmoc-MS10 1524.6 1524.7 23.1 b A 38 [D-Ser5]MS10 1302.5 1302.6 11.8 c A 39 [D-Asn4]MS10 1302.5 1302.6 11.6 c A 40 [D-Trp3]MS10 1302.5 1302.6 11.5 c A 41 [D-Asn2]MS10 1302.5 1302.6 11.7 c A 42 [D-Tyr1]MS10 1302.5 1302.6 11.4 c A 44 [Lys9]MS10 1274.6 1274.6 11.7 c A 45 [Ala8]MS10 1260.5 1260.6 10.0 c A 50 [Ala7]MS10 1316.3 1316.7 12.2 c A 51 [NMePhe10]MS10 1316.3 1316.7 22.7 a A 53 des(1-3)-Fmoc-MS10 1061.2 1061.5 27.3 a A 54 des(1-2)-Fmoc-MS10 1247.4 1247.6 29.6 a A 55 des(1)-Fmoc-MS10 1361.6 1361.6 28.2 a A 56 [Lys2]MS10 1316.6 1316.7 16.8 d M 57 [Asp2]MS10 1303.7 1303.6 17.7 d M 58 [Tyr2]MS10 1351.7 1351.7 18.2 d M 59 [Leu2]MS10 1301.6 1301.7 19.2 d M 60 [Pya(3)10]MS10 1303.6 1303.6 14.7 d M 61 [Phe(4F)10]MS10 1320.6 1320.6 18.0 d M 67 [Ala3]MS10 1187.4 1187.6 9.3 c A 68 [Leu3]MS10 1229.6 1229.6 11.1 c A 69 [Ser3]MS10 1203.5 1203.6 8.9 c A 70 [Asp3]MS10 1231.6 1231.6 9.0 c A 71 [Lys3]MS10 1244.6 1244.7 8.1 c A 72 [Ala1]MS10 1210.5 1210.6 11.1 c A 73 [Leu1]MS10 1252.6 1252.7 12.5 c A 74 [Ser1]MS10 1226.6 1226.6 10.9 c A 75 [Asp1]MS10 1254.4 1254.6 11.0 c A

TABLE 2 76 [Lys1]MS10 1267.6 1267.7 10 c A 77 [Phe(4CN)10]MS10 1327.5 1327.6 17.2 d M 78 [Trp(For)3, Phe(4CN)10]MS10 1355.6 1355.6 17.4 d M 79 [Hph10]MS10 1316.5 1316.7 20.6 a A 81 [NMeArg9]MS10 1316.3 1316.7 23.3 a A 82 [Arg(Me)9]MS10 1316.5 1316.7 20.1 a E 83 [Arg(Me2)asy9]MS10 1330.4 1330.7 21.3 a A 87 des(4-5)-Boc-MS10 1201.6 1201.6 22.5 d M 88 des(4-5)-MS10 1101.5 1101.5 18.6 d M 90 [Lys9,9Ψ10,CH2NH]MS10 1260.6 1260.7 19.8 a D 91 [8Ψ9,CH2NH]MS10 1288.7 1288.7 20.5 a D 97 [Har9]MS10 1316.3 1316.7 11.9 c A 98 [Lys(Me2)9]MS10 1302.6 1302.7 11.8 c A 101 [Ser7]MS10 1332.6 1332.6 11.6 c A 105 [Nle8]MS10 1302.3 1302.6 11.9 c A 107 [Val8]MS10 1288.5 1288.6 11 c A 109 [Tyr10]MS10 1408.4 1408.7 10.2 c A 110 [Nal(2)10]MS10 1332.4 1332.6 13.5 c A 111 [Phe(F5)10]MS10 1392.2 1392.6 13.5 c A 112 [Cha10]MS10 1308.4 1308.7 13.4 c A 114 des(1-3)-3-(3-Indolyl)propionyl-MS10 1010.5 1010.5 13.8 c A + I 121 des(1-4)-[Trp5]MS10 824.3 824.5 22.5 d M 123 [NMeLeu8]MS10 1316.7 1316.7 12.7 c A 126 [NMeSer5]MS10 1317 1316.7 11.8 c A 127 [D-Asn4,NMePhe6]MS10 1316.7 1316.7 11.8 c A 128 [10Ψ,CSNH]MS10 1318.4 1318.6 21.8 a C 129 [Arg(Me2)sy9]MS10 1331.2 1330.7 20.9 a A 130 [Phe(4Cl)10]MS10 1336.4 1336.6 13.1 c A 131 [Phe(4NH2)10]MS10 1317.4 1317.6 8.3 c A 132 [Phe(4NO2)10]MS10 1347.4 1347.6 12.2 c A 133 [Nal(1)10]MS10 1352.6 1352.7 13.5 c A 134 [Trp10]MS10 1341.5 1341.6 12 c A 137 [Nle9]MS10 1259.4 1259.6 15.3 c A 138 [Cit9]MS10 1303.4 1303.6 12.2 c A 140 [Arg(Me)9,NMePhe10]MS10 1330.4 1330.7 21 a E 141 [D-Tyr1,Arg(Me)9]MS10 1316.9 1316.7 20.2 a E 142 [D-Tyr1,D-Trp3,Arg(Me)9]MS10 1316.7 1316.7 20.1 a E 143 [D-Trp3,Arg(Me)9]MS10 1316.7 1316.7 20.3 a E 144 des(1-3)-Fmoc-[Arg(Me)9]MS10 1075.2 1075.5 26 a E 145 des(1-2)-Fmoc-[Arg(Me)9]MS10 1261.2 1261.6 28.6 a E

TABLE 3 146 [10Ψ,CSNH,D-Tyr1]MS10 1318.4 1318.6 21.4 a C 150 [Tyr6]MS10 1318.4 1318.6 10.2 c A 151 [Nal(1)6]MS10 1352.6 1352.7 13.5 c A 152 [Nal(2)6]MS10 1352.6 1352.7 13.6 c A 153 [Phe(F5)6]MS10 1392.5 1392.6 13.7 c A 154 [Phe(4F)6]MS10 1320.8 1320.6 12.3 c A 156 [Cha6]MS10 1308.2 1308.5 13.2 c A 163 [6Ψ7,CH2NH]MS10 1288.7 1288.7 18.2 a D 165 [Dap(Gly)9] MS10 1289.8 1289.6 19.2 a E 166 [6Ψ7,CSNH]MS10 1318.7 1318.6 20.8 a F 169 [D-Tyr1,Ala3,Arg(Me)9]MS10 1202.1 1201.6 9.0 c E 170 [D-Tyr1,Ser3,Arg(Me)9]MS10 1218.2 1217.6 8.8 c E 171 [D-Tyr1,Cha3,Arg(Me)9]MS10 1284.2 1283.7 12.1 c E 172 [D-Tyr1,Cha6,Arg(Me)9]MS10 1402.9 1322.7 13.1 c E 173 [D-Tyr1,Ala7,Arg(Me)9]MS10 1410.9 1330.7 12.2 c E 174 [D-Tyr1,Arg(Me)9,Trp10]MS10 1335.3 1335.7 11.7 c E 176 [AzaGly7]MS10 1303.3 1303.6 18.9 a G 181 [D-Tyr1,Cha3,6,Arg(Me)9]MS10 1370.6 1370.6 13.9 c E 182 [D-Tyr1,Cha3,6,Arg(Me)9,Trp10] MS10 1328.2 1328.7 21.3 a E 183 [Phe(4NH2)9]MS10 1328.2 1308.6 19.4 a A 184 [Phe(4-Guanidino)9]MS10 1350.4 1350.6 19.7 a E 185 [Dap(GnGly)9]MS10 1331.2 1331.6 19.1 a E 186 [Trp(For)10]MS10 1369.3 1369.6 19.6 a B 187 [Abu8]MS10 1274.4 1274.6 10.4 c A 189 [Ala(3-Bzt)10]MS10 1358.4 1358.6 13.4 c A 190 [D-Tyr1,Cha3,AzaGly7,Arg(Me)9] MS10 1284.5 1284.7 19.3 a H 191 [D-Tyr1,Ser3,AzaGly7,Arg(Me)9] MS10 1218.4 1218.6 15.9 a H 192 [D-Tyr1,Arg(Et)9]MS10 1330.5 1330.7 18.9 a E 193 [D-Tyr1,Arg(n-Pr)9]MS10 1344.8 1344.7 19.4 a E 194 [D-Tyr1,Arg(Ac)9]MS10 1345.1 1344.6 18.8 a E 197 [Phe(3F)10]MS10 1320.6 1320.6 12.2 c A 198 [Phe(3,4F2)10]MS10 1338.7 1338.6 12.7 c A 199 [Phe(3,4Cl2)10]MS10 1370.6 1370.6 13.1 c A 200 [Phe(3CF3)10]MS10 1370.6 1370.6 13.1 c A 201 [Ala(2-Qui)10]MS10 1353.4 1353.6 9.8 c A 203 [D-Tyr1,Cha6,Arg(Me)9]MS10 1322.4 1322.7 12.9 c E 204 [D-Tyr1,Ala7,Arg(Me)9]MS10 1330.4 1330.7 11.7 c E 205 [D-Tyr1,Thr3,Arg(Me)9]MS10 1231.4 1231.6 9.0 c E 206 [D-Tyr1,Ile3,Arg(Me)9]MS10 1243.6 1243.7 10.1 c E 207 [D-Tyr1,Ser4,Arg(Me)9]MS10 1289.5 1289.6 11.7 c E

TABLE 4 208 [D-Tyr1,Thr4,Arg(Me)9]MS10 1303.4 1303.7 12.0 c E 209 [D-Tyr1,Gln4,Arg(Me)9]MS10 1330.8 1330.7 11.6 c E 210 [D-Tyr1,Ala4,Arg(Me)9]MS10 1273.7 1273.6 12.3 c E 211 [D-Tyr1,Thr5,Arg(Me)9]MS10 1330.7 1330.7 11.7 c E 212 [D-Tyr1,Ala5,Arg(Me)9]MS10 1300.5 1300.7 12.1 c E 213 [D-Tyr1,Val8,Arg(Me)9]MS10 1302.5 1302.6 10.4 c E 214 [D-Tyr1,Gln2,Arg(Me)9]MS10 1330.5 1330.7 11.4 c E 215 [D-Tyr1,Thr2,Arg(Me)9]MS10 1303.4 1303.7 11.9 c E 216 des(1)-[D-Asn2,Arg(Me)9]MS10 1153.3 1153.6 11.1 c E 217 des(1)-[D-Tyr2,Arg(Me)9]MS10 1202.4 1202.6 12.3 c E 218 [N((CH2)3Gn))Gly9]MS10 1302.5 1302.7 18.6 a L 220 [Arg(Et)9]MS10 1330.7 1330.7 19.5 a E 221 [D-Tyr1,Thr3,AzaGly7,Arg(Me)9] MS10 1232.5 1232.6 16.1 a H 222 des(1)-[D-Tyr2,AzaGly7,Arg(Me)9]MS10 1203.5 1203.6 19.3 a H 223 des(1-2)-[D-Trp3,Arg(Me)9]MS10 1039.5 1039.5 11.0 c E 224 des(1)-[D-Tyr2,D-Trp3,Arg(Me)9]MS10 1202.4 1202.6 12.2 c E 225 des(1)-[D-Asn2,D-Trp3,Arg(Me)9]MS10 1153.6 1153.6 11.1 c E 226 des(1)-[D-Tyr2,Ser3,Arg(Me)9] MS10 1103.5 1103.6 9.5 c E 227 des(1)-[D-Tyr2,Thr3,Arg(Me)9] MS10 1117.3 1117.6 9.8 c E 228 des(1)-[D-Tyr2,Ile3,Arg(Me)9]MS10 1129.6 1129.6 11.5 c E 229 [D-Tyr1,Val3,Arg(Me)9]MS10 1229.5 1229.6 9.7 c E 230 [D-Tyr1,D-Asn2,Arg(Me)9]MS10 1316.5 1316.7 11.8 c E 231 [D-Tyr1,D-Asn2,D-Trp3,Arg(Me)9]MS10 1316.3 1316.7 11.7 c E 232 [D-Tyr1,AzaGly7,Arg(Me)9]MS10 1317.0 1317.6 21.0 a H 233 [D-Tyr1,Ile3,AzaGly7,Arg(Me)9] MS10 1244.1 1244.7 20.9 a H 234 [D-Tyr1,Val3,AzaGly7,Arg(Me)9] MS10 1230.5 1230.6 20.6 a H 235 [D-Tyr1,Ala3,AzaGly7,Arg(Me)9] MS10 1202.5 1202.6 20.5 a H 236 [D-Tyr1,D-Trp3,AzaGly7,Arg(Me)9]MS10 1317.6 1317.6 20.9 a H 237 [D-Tyr1,D-Asn2,AzaGly7,Arg(Me)9]MS10 1317.6 1317.6 20.9 a H 238 [D-Tyr1,D-Asn2,D-Trp3,AzaGly7,Arg(Me)9]MS10 1317.6 1317.6 20.6 a H 239 des(1)-[D-Tyr2,Ser3,AzaGly7,Arg(Me)9]MS10 1104.1 1104.6 19.0 a H 240 des(1)-[D-Tyr2,Ile3,AzaGly7,Arg(Me)9]MS10 1130.1 1130.6 20.3 a H 241 des(1)-[D-Tyr2,Thr3,AzaGly7,Arg(Me)9]MS10 1188.0 1118.6 20.3 a H 242 des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9]MS10 1202.9 1203.6 21.2 a H 244 [D-Tyr1,Phe3,AzaGly7,Arg(Me)9] MS10 1278.6 1278.6 10.5 c H 245 [D-Tyr1,Nal(1)3,AzaGly7,Arg(Me)9]MS10 1328.5 1328.7 12.3 c H 246 [D-Tyr1,Nal(2)3,AzaGly7,Arg(Me)9]MS10 1328.7 1328.7 12.3 c H 247 [D-Tyr1,Phe(2Cl)3,AzaGly7,Arg(Me)9]MS10 1315.6 1312.6 11.3 c H

TABLE 5 248 [D-Tyr1,Phe(3Cl)3,AzaGly7,Arg(Me)9]MS10 1312.5 1312.6 11.6 c H 249 [D-Tyr1,Phe(4Cl)3,AzaGly7,Arg(Me)9]MS10 1312.5 1312.6 11.7 c H 250 [D-Tyr1,Phe(4NH2)3,AzaGly7,Arg(Me)9]MS10 1293.4 1293.6 7.8 c H 251 [D-Tyr1,Pya(3)3,AzaGly7,Arg(Me)9]MS10 1279.4 1279.6 7.8 c H 252 [D-Tyr1,D-Ala3,AzaGly7,Arg(Me)9]MS10 1202.4 1202.6 8.5 c H 253 [D-Tyr1,Pro3,AzaGly7,Arg(Me)9] MS10 1228.4 1228.6 8.6 c H 254 des(1)-[D-Tyr2,Phe3,AzaGly7,Arg(Me)9]MS10 1164.4 1164.6 11.8 c H 255 des(1)-[D-Tyr2,Nal(2)3,AzaGly7,Arg(Me)9]MS10 1214.5 1214.6 13.7 c H 256 des(1)-[D-Pya(3)2,Phe3,AzaGly7,Arg(Me)9]MS10 1149.3 1149.6 9.5 c H 257 [D-Tyr1,D-Asn2,Phe3,AzaGly7,Arg(Me)9]MS10 1278.5 1278.6 10.9 c H 258 [D-Pya(3)1,AzaGly7,Arg(Me)9] MS10 1302.3 1302.6 10.1 c H 259 [D-Ala1,AzaGly7,Arg(Me)9]MS10 1225.5 1225.6 10.7 c H 260 des(1-3)-3-(3-Indolyl)propionyl- 1025.2 1025.5 13.7 c I [AzaGly7,Arg(Me)9]MS10 261 [7Ψ8,CH2NH]MS10 1288.1 1288.7 17.2 a D 265 des(1-3)-Indole-3-carbonyl- 997.3 997.5 12.6 c I [AzaGly7,Arg(Me)9]MS10 266 des(1-3)-Indole-3-acetyl- 1011.3 1011.5 12.7 c I [AzaGly7,Arg(Me)9]MS10 267 des(1-3)-4-(3-Indolyl)butyryl- 1039.3 1039.5 14.4 c I [AzaGly7,Arg(Me)9]MS10 268 des(1-3)-Diphenylacetyl- 1048.5 1048.5 15.7 c I [AzaGly7,Arg(Me)9]MS10 269 des(1-3)-3-Phenylpropionyl- 986.7 986.5 13.5 c I [AzaGly7,Arg(Me)9]MS10 270 Endo-Phe5a-[D- 1425.5 1425.7 13.4 c H Tyr1,Phe3,AzaGly7,Arg(Me)9]MS10 271 des(1-2)-[AzaGly7,Arg(Me)9]MS10 1040.2 1040.5 10.4 c H 272 des(1-2)-Acetyl-[AzaGly7,Arg(Me)9]MS10 1082.3 1082.6 12.8 c H 273 des(1-2)-Amidino-[AzaGly7,Arg(Me)9]MS10 1082.3 1082.6 11.4 c J 274 des(1-2)-Acetyl-[Ala3,AzaGly7,Arg(Me)9]MS10 967.3 967.5 9.6 c H 275 des(1-2)-Acetyl-[Arg3,AzaGly7,Arg(Me)9]MS10 1052.2 1052.6 8.5 c H 276 des(1-2)-Acetyl-[Thr3,AzaGly7,Arg(Me)9]MS10 997.2 997.5 9.4 c H 277 des(1-3)-n-Hexanoyl-[AzaGly7,Arg(Me)9]MS10 952.2 952.5 13.4 c I 278 des(1-3)-Cyclohexanecarbonyl-[AzaGly7,Arg(Me)9]MS10 964.3 964.5 13.2 c I 279 des(1-3)-2-(Indol-3-yl)ethylcarbamoyl- 1040.2 1040.5 20.1 a N [AzaGly7,Arg(Me)9]MS10 281 [D-Tyr1,Pya(2)6,Arg(Me)9]MS10 1317.3 1317.6 7.8 c E 282 [D-Tyr1,Pya(4)6,Arg(Me)9]MS10 1317.2 1317.6 8.0 c E

TABLE 6 283 [D-Tyr1,D- 1284.3 1284.7 12.3 c H Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 284 [D-Tyr1,D- 1232.2 1232.6 8.6 c H Asn2,Thr3,AzaGly7,Arg(Me)9]MS10 285 [D-Tyr1,Pya(2)3,AzaGly7,Arg(Me)9]MS10 1279.2 1279.6 7.9 c H 286 [D-Tyr1,Pya(4)3,AzaGly7,Arg(Me)9]MS10 1279.2 1279.6 7.7 c H 287 [D-Tyr1,D-Ser2,AzaGly7,Arg(Me)9]MS10 1290.1 1290.6 11.4 c H 288 [D-Tyr1,D-His2,AzaGly7,Arg(Me)9]MS10 1340.2 1340.7 10.3 c H 289 des(1)-[D-Pya(3)2,AzaGly7,Arg(Me)9]MS10 1188.2 1188.6 10.0 c H 290 [D-Pya(3)1,D- 1269.5 1269.7 10.9 c H Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 291 [D-Pya(3)1,D- 1317.4 1318.7 12.0 c H Tyr2,Cha3,AzaGly7,Arg(Me)9]MS10 293 [4Ψ5,CH2NH]MS10 1288.1 1288.7 18.4 a D 294 [1Ψ2,CH2NH]MS10 1288.4 1288.7 19.2 a D 295 [2Ψ3,CH2NH]MS10 1288.1 1288.7 18.2 a D 296 [6Ψ7,CSNH,D-Tyr1,Arg(Me)9] MS10 1332.1 1332.6 20.5 a F 297 [D-Tyr1,Thr5,AzaGly7,Arg(Me)9] MS10 1331.2 1330.7 11.3 c H 298 [D-Tyr1,D- 1331.1 1330.7 11.6 c H Asn2,Thr5,AzaGly7,Arg(Me)9]MS10 299 [1Ψ2,CH2NH,AzaGly7,Arg(Me)9] MS10 1303.4 1330.7 11.3 c D + H 300 [1Ψ2,CH2NH,D-Trp3,AzaGly7,Arg(Me)9]MS10 1303.4 1303.7 10.8 c D + H 301 [D-Tyr1,Ala(2- 1329.4 1329.6 9.0 c H Qui)3,AzaGly7,Arg(Me)9]MS10 302 [D-Tyr1,D- 1279.4 1279.6 7.6 c H Pya(4)3,AzaGly7,Arg(Me)9]MS10 303 [D-Tyr1,D- 1279.4 1279.6 7.6 c H Asn2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 304 [D-Asn2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 1279.4 1279.6 7.7 c H 305 des(1)-[D-Tyr2,D- 1165.4 1165.6 8.0 c H Pya(4)3,AzaGly7,Arg(Me)9]MS10 306 [D-Pya(4)1,D- 1269.5 1269.5 10.8 c H Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 307 [7Ψ8,CH2NH,D-Tyr1,Arg(Me)9] MS10 1302.2 1302.7 17.9 a D + E 308 [6Ψ7,CH2NH,D-Tyr1,Arg(Me)9] MS10 1302.3 1302.7 18.1 a D + E 310 [Nar9]MS10 1288.8 1288.6 19.4 a E 311 [Nar(Me)9]MS10 1302.3 1302.6 19.5 a E 312 [Har(Me)9]MS10 1330.2 1330.7 19.5 a E 313 [Dab9]MS10 1246.1 1246.6 19.3 a A 314 [Orn9]MS10 1260.2 1260.6 19.3 a A 315 des(1)-[D- 1121.3 1121.6 11.4 c H Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 316 [D-Tyr1,D-Asn2,Thr3,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 1250.5 1250.6 17.0 a H 317 [D-Tyr1,D-Asn2,Pya(4)3,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 1297.4 1297.6 16.4 a H 318 [D-Tyr1,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 1335.4 1335.6 19.0 a H

TABLE 7 319 [6Ψ7,NHCO,D-Tyr1,Arg(Me)9] MS10 1316.3 1316.7 18.7 a K 322 des(1-3)-3-(3-Pyridyl)propionyl-[AzaGly7,Arg(Me)9]MS10 987.4 987.5 8.1 c I 323 des(1-3)-4-Imidazoleacetyl-[AzaGly7,Arg(Me)9]MS10 962.5 962.5 7.9 c I 324 des(1-3)-4-Piperidinecarbonyl-[AzaGly7,Arg(Me)9]MS10 965.5 965.5 7.7 c I 325 des(1-3)-1-Piperidineacetyl-[AzaGly7,Arg(Me)9]MS10 979.5 979.5 8.5 c I 326 des(1-3)-1-Methylpiperidinio-1-acetyl-[AzaGly7,Arg(Me)9]MS10 993.4 993.6 8.7 c I 327 des(1-3)-1-Pyridinioacetyl-[AzaGly7,Arg(Me)9]MS10 973.4 973.5 8.1 c I 328 des(1-3)-D-Glucronyl-[AzaGly7,Arg(Me)9]MS10 1030.2 1030.5 7.5 c I 332 des(1-5)-GuAmb-[AzaGly7,Arg(Me)9]MS10 828.6 828.5 9.9 c H + J 333 des(1-5)-GuAmb-[Arg(Me)9]MS10 827.6 827.5 10.6 c E + J 334 des(1-5)-GuAmb-[AzaGly7,Arg(Me)9,Trp10]MS10 867.6 867.5 10.3 c H + J 339 des(1-5)-3-(3-Indoly)propionyl-[AzaGly7,Arg(Me)9]MS10 824.6 824.5 16.0 c S 340 des(1-5)-3-(3-Pyridyl)propionyl-[AzaGly7,Arg(Me)9]MS10 786.4 786.4 8.5 c S 341 des(1-5)-Benzoyl-[AzaGly7,Arg(Me)9]MS10 757.2 757.4 14.8 c S 344 des(1-5)-Indole-3-carbonyl-[AzaGly7,Arg(Me)9]MS10 796.8 796.4 14.5 c S 345 des(1-5)-Indole-3-acetyl-[AzaGly7,Arg(Me)9]MS10 810.5 810.4 15.2 c S 346 des(1-5)-Ac-[AzaGly7,Arg(Me)9]MS10 695.5 695.4 10.7 c S 347 des(1-5)-n-Hexanoyl-[AzaGly7,Arg(Me)9]MS10 751.7 751.5 16.2 c S 348 des(1-5)-Z-[AzaGly7,Arg(Me)9]MS10 787.5 787.4 16.7 c S 349 des(1-5)-Tos-[AzaGly7,Arg(Me)9]MS10 807.5 807.4 15.9 c S 351 des(1-5)-Benzoyl-MS10 742.4 742.4 15.1 c A + I 352 des(1-5)-3-(3-Indolyl)propionyl-MS10 809.6 809.4 16.2 c A + I 353 des(1-5)-Benzoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 796.4 796.4 15.0 c S 354 des(1-5)-3-(3-Indolyl)propionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 863.4 863.5 16.2 c S 358 des(1-5)-Ac [AzaGly7,Arg(Me)9,Trp10]MS10 734.4 734.4 11.2 c S 362 des(1-6)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9]MS10 638.4 638.4 12.5 c S 364 des(1-5)-2-(Indol-3-yl)ethylcarbamoyl-[AzaGly7,Arg(Me)9]MS10 839.6 839.5 15.8 c N 366 des(1-5)-n-Hexanoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 790.5 790.5 16.5 c S 367 des(1-5)-Z-[AzaGly7,Arg(Me)9,Trp10]MS10 826.5 826.4 16.8 c S 368 des(1-5)-Tos-[AzaGly7,Arg(Me)9,Trp10]MS10 846.6 846.4 16.0 c S 369 des(1-5)-2-(Indol-3-yl)ethylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 878.9 878.5 16.1 c N

TABLE 8 373 des(1-6)-(2S)-2-acethoxy-3-phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 735.5 735.4 13.6 c S 374 des(1-6)-Z-[AzaGly7,Arg(Me)9,Trp10]MS10 679.5 679.4 31.2 c S 375 2-Aminoethyl-Gly-[D-Tyr1,Arg(Me)9]MS10 1416.4 1416.7 17.3 e E 378 des(1-6)-Diphenylacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 739.4 739.4 15.9 c S 379 des(1-6)-(2S)-2-(3-Indolylprpionyloxy)-3-phenylpropionyl- 864.7 864.5 18.2 c S [AzaGly7,Arg(Me)9,Trp10]MS10 380 des(1-6)-(2S)-2-Benzoyloxy-3-phenylpropionyl- 797.6 797.4 17.2 c S [AzaGly7,Arg(Me)9,Trp10]MS10 385 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 1204.4 1204.6 8.3 c O 386 des(1-3)-3-(3-Pyridyl)propionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 1026.4 1026.2 8.5 c I 387 Dap-[D-Tyr1,Arg(Me)9]MS10 1402.7 1402.7 17.0 e E 392 des(1-5)-Benzoyl-[Ala6,AzaGly7,Arg(Me)9,Trp10]MS10 720.5 720.4 11.4 c S 393 des(1-6)-Dibenzylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 768.7 768.4 16.9 c P 397 Methylthiocarbamoyl-Sar-[D-Tyr1,Arg(Me)9]MS10 1461.2 1460.7 20.0 e E 400 (S)-1-(Quinolin-8-yl-carbamoyl)-4-thiapentylcarbamoyl- 1617.9 1617.7 21.7 e E [D-Tyr1,Arg(Me)9]MS10 408 des(1-6)-1-Oxo-isochroman-3-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 719.1 719.4 11.3 c S 412 des(1-6)-(2R)-2-Benzoyloxy-3-phenylpropionyl- 796.8 797.4 17.1 c S [AzaGly7,Arg(Me)9,Trp10]MS10 417 des(1-6)-Benzylphenethylcarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 782.9 782.4 17.8 c P 421 des(1-5)-Benzoyl-[6Ψ7,CH2O,Arg(Me)9,Trp10]MS10 782.2 782.4 22.1 e Q 423 des(1-5)-Benzoyl-[6Ψ7,NHCO,Arg(Me)9,Trp10]MS10 795.4 795.4 19.8 e I + K 428 des(1-6)-Dibenzylaminocarbamoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 783.8 783.4 17.0 c P 431 des(1-5)-Benzoyl-[AzaPhe6,AzaGly7,Arg(Me)9,Trp10]MS10 797.7 797.4 15.3 c U 432 des(1-5)-3-(3-Pyridyl)propionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 797.8 797.4 9.2 c S 434 des(1-7)-Dibenzylaminocarbamoylacetyl-[Arg(Me)9,Trp10]MS10 767.6 767.4 14.5 e R 435 des(1-5)-2-Pyridinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 797.7 797.4 14.1 c S 436 des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 797.8 797.4 8.8 c S 437 des(1-5)-Propionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 748.7 748.4 14.4 c S 438 des(1-5)-Isobutyryl-[AzaGly7,Arg(Me)9,Trp10]MS10 762.4 762.4 13.7 c S 439 des(1-5)-Cyclohexanecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 802.6 802.5 16.3 c S

TABLE 9 440 des(1-5)-Phenylacetyl- 810.1 810.4 15.6 c S [AzaGly7,Arg(Me)9,Trp10]MS10 441 des(1-5)-Benzoyl- 797.6 797.4 9.5 c S [Pya(2)6,AzaGly7,Arg(Me)9,Trp10]MS10 442 des(1-5)-Benzoyl- 797.6 797.4 9.1 c S [Pya(4)6,AzaGly7,Arg(Me)9,Trp10]MS10 443 des(1-5)-2-Methylnicotinoyl- 811.6 811.4 9.0 c S [AzaGly7,Arg(Me)9,Trp10]MS10 444 des(1-5)-5-Methylnicotinoyl- 811.5 811.4 9.2 c S [AzaGly7,Arg(Me)9,Trp10]MS10 445 des(1-5)-6-Methylnicotinoyl- 811.4 811.4 8.6 c S [AzaGly7,Arg(Me)9,Trp10]MS10 446 des(1-5)-Pyrazinecarbonyl- 798.4 798.4 12.4 c S [AzaGly7,Arg(Me)9,Trp10]MS10 447 des(1-5)-Cyclopropanecarbonyl- 765.9 766.5 13.0 c S [AzaGly7,Arg(Me)9,Trp10]MS10 448 des(1-5)-Trifluoroacetyl- 788.6 788.4 14.6 c S [AzaGly7,Arg(Me)9,Trp10]MS10 449 des(1-5)-Benzoyl- 802.6 802.5 17.2 c S [Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 450 des(1-5)-Benzyl- 782.7 782.4 11.2 c H + D [AzaGly7,Arg(Me)9,Trp10]MS10 451 des(1-5)-Cyclopropanecarbonyl- 765.9 766.5 15.1 c S [Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 452 des(1-5)-(R)-3-hydroxy-2- 777.8 778.4 11.4 c S methylpropionyl- [AzaGly7,Arg(Me)9,Trp10]MS10 453 des(1-5)-2-Hydroxyisobutyryl- 777.9 778.4 11.9 c S [AzaGly7,Arg(Me)9,Trp10]MS10 454 des(1-5)-3-Furancarbonyl- 786.8 786.4 13.7 c S [AzaGly7,Arg(Me)9,Trp10]MS10 455 des(1-5)-Pyrrole-2-carbonyl- 785.7 785.4 13.9 c S [AzaGly7,Arg(Me)9,Trp10]MS10 459 des(1-5)-4-Imidazolecarbonyl- 786.6 786.4 8.5 c S [AzaGly7,Arg(Me)9,Trp10]MS10 460 des(1-5)-4-Pyridinecarbonyl- 783.5 783.4 6.7 c S [AzaGly7,Val8,Arg(Me)9,Trp10]MS10 461 des(1-5)-4-Pyridinecarbonyl- 808.5 808.4 11.1 c S [AzaGly7,Arg(Me)9,Nal(2)10]MS10 462 des(1-5)-6-Hydroxynicotinoyl- 813.8 813.4 10.2 c S [AzaGly7,Arg(Me)9,Trp10]MS10 463 des(1-5)-6-Chloronicotinoyl- 831.8 831.4 14.3 c S [AzaGly7,Arg(Me)9,Trp10]MS10 464 des(1-5)-6-(Trifluoromethyl)nicotinoyl- 865.7 865.4 15.8 c S [AzaGly7,Arg(Me)9,Trp10]MS10 466 des(1-5)-2-Azetidinecarbonyl- 775.8 775.4 8.9 c H [AzaGly7,Arg(Me)9,Trp10]MS10 467 des(1-5)-Dimethylcarbamoyl- 763.7 763.4 12.5 c H + N [AzaGly7,Arg(Me)9,Trp10]MS10 468 des(1-5)-1-Azetidinecarbonyl- 775.4 775.4 12.5 e H + N [AzaGly7,Arg(Me)9,Trp10]MS10 471 des(1-5)-4-Pyridinecarbonyl- 758.8 758.5 9.1 c S [AzaGly7,Arg(Me)9]MS10 472 des(1-5)-4-Aminobenzoyl- 811.8 811.4 11.2 c H [AzaGly7,Arg(Me)9,Trp10]MS10 473 des(1-5)-4-Aminomethylbenzoyl- 825.8 825.5 9.5 c H [AzaGly7,Arg(Me)9,Trp10]MS10

TABLE 10 474 des(1-5)-Pyrrole-3-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 785.8 785.4 12.2 c S 475 des(1-5)-Pyrimidine-4-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 798.8 798.4 12.2 c S 477 des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Orn9,Trp10]MS10 741.6 741.3 8.6 c G + I 478 des(1-5)-4-Pyridinecarbonyl-[AzaGly7,Har9,Trp10]MS10 797.9 797.4 8.6 c G + I 479 des(1-5)-Pyrimidine-2-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 798.8 798.4 11.8 c S 480 des(1-5)-Pyridazine-4-carbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 798.8 798.4 10.7 c S 481 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har9,Trp10]MS10 1204.8 1204.6 8.2 c G 486 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Orn9]MS10 1109.6 1109.6 13.6 e G 487 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Lys9]MS10 1123.5 1123.6 13.5 e G 488 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har9]MS10 1165.6 1165.6 14.1 e G 489 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Har(Me)9]MS10 1179.6 1179.6 13.9 e O 490 des(1)-[D-Tyr2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 1165.6 1165.6 7.6 c H 491 des(1)-[D-Tyr2,D-Pya(4)3,Trp5,AzaGly7,Arg(Me)9,Trp10]MS10 1303.8 1303.6 17.2 e O 492 des(1)-[D-Tyr2,D-Pya(4)3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 1161.9 1161.6 14.3 e O 493 des(1)-[D-Tyr2,D-Pya(4)3,Thr4,AzaGly7,Arg(Me)9,Trp10]MS10 1191.9 1191.6 14.2 e O 494 des(1,4)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 1090.9 1090.6 8.4 c O 495 des(1-3)-[D-Tyr4,Pya(4)5,AzaGly7,Arg(Me)9,Trp10]MS10 1003.9 1003.5 7.6 c O 496 des(1)-[D-Tyr2,D-Pya(4)3,Cha6,Arg(Me)9,Trp10]MS10 1209.8 1209.7 10.4 c E 497 des(1)-[D-Tyr2,D-Pya(4)3,Cha6,Ala7,Arg(Me)9,Trp10]MS10 1223.7 1223.7 10.5 c E 498 des(1)-[D-Tyr2,D-Pya(4)3,Ile5,AzaGly7,Arg(Me)9,Trp10]MS10 1230.7 1230.7 16.8 c O 499 des(1-3)-3-Phenylpropionyl-[AzaGly7,Arg(Me)9,Trp10]MS10 1025.3 1025.5 13.6 c T 500 des(1-3)-3-Phenylpropionyl-[Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 982.5 982.5 15.1 c T 501 des(1)-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1218.7 1218.6 14.2 e O 502 des(1)-[D-Tyr2,Pya(4)3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 1161.4 1161.6 14.0 e O 503 des(1)-[D-Tyr2,D-Trp3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 1199.3 1199.6 17.8 e O 504 [Acp1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 1278.6 1278.5 8.1 c H 505 des(1-3)-3-Phenylpropionyl-[Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1040.0 1039.5 13.9 c T 506 des(1-3)-3-Phenylpropionyl-[Ile5,AzaGly7,Arg(Me)9,Trp10]MS10 1052.0 1051.6 17.6 c T 507 des(1-3)-3-Phenylpropionyl-[Trp6,AzaGly7,Arg(Me)9,Trp10]MS10 1064.2 1064.5 13.7 c T

TABLE 11 508 des(1-3)-3-Phenylpropionyl- 1043.2 1043.5 14.1 c T [Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 509 des(1-3)-Benzoyl- 997.8 997.5 12.4 c T [AzaGly7,Arg(Me)9,Trp10]MS10 510 des(1-3)-Ac- 935.9 935.5 9.5 c T [AzaGly7,Arg(Me)9,Trp10]MS10 511 des(1)-[D-Tyr2,D-Trp3,Ala4,Thr5, 1213.6 1213.6 17.9 e O AzaGly7,Arg(Me)9,Trp10]MS10 512 des(1)-[D-Tyr2,D- 1256.7 1256.6 17.0 e O Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 513 des(1)-[D-Tyr2,D- 1213.8 1213.6 18.5 e O Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 514 des(1)-[D-Tyr2,D- 1160.8 1160.6 17.9 e O Phe3,Ala4,AzaGly7,Arg(Me)9,Trp10]MS10 515 des(1)-[D-Tyr2,D- 1216.8 1216.6 15.7 e O Pya(4)3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 a: 0-70% AcCN/35 min, flow 1 ml/min, Wakosil-II 5C18 HG (4.6 × 100 mm) b: 0-70% AcCN/35 min, flow 1 ml/min, YMC ODS AM-301 (4.6 × 100 mm) c: 20-70% AcCN/25 min, flow 1 ml/min, YMC ODS AM-301 (4.6 × 100 mm) d: 5-75% AcCN/35 min, flow 1 ml/min, Wakosil-II 5C18 HG (4.6 × 100 mm) e: 0-50% AcCN/25 min, flow 1 ml/min, Wakosil-II 5C18 HG (4.6 × 100 mm) Only compound no. 1 represents M+ value.

The structures of compounds synthesized as in EXAMPLES 1 to 24 and physicochemical properties of these compounds are shown in TABLE 12 below.

TABLE 12 Comp. HPLC HPLC No. M + H+ (obs.) M + H+ (cal.) (min.) mode 516 Ac-des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 1207.8 1207.6 9.2 c 517 des(1-3)-3-Phenylpropionyl-[Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 1051.6 1051.5 13.7 c 518 des(1-3)-3-Phenylpropionyl-[Cha6,Arg(Me)9,Trp10]MS10 1030.5 1030.6 15.8 c 519 des(1-3)-Phenylacetyl-[AzaGly7,Arg(Me)9,Trp10]MS10 1011.5 1011.5 12.7 c 521 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7]MS10 1151.5 1151.6 13.4 e 522 des(1-3)-Benzoyl-[Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1011.9 1011.5 12.7 c 523 des(1-3)-Benzoyl-[Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 1029.9 1029.5 13.3 c 524 des(1-3)-3-Phenylpropionyl-[Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 1036 1035.6 15.8 c 527 des(1)-[D-Tyr2,D-Pya(4)3,Hyp5,AzaGly7,Arg(Me)9,Trp10]MS10 1230.5 1230.6 14.3 c 528 des(1)-[D-Tyr2,D-Pya(4)3,Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 1214.7 1214.6 15.7 e 529 des(1)-[D-Tyr2,D-Pya(4)3,Tle5,AzaGly7,Arg(Me)9,Trp10]MS10 1230.7 1230.7 16.5 e 530 des(1)-[D-Tyr2,D-Pya(4)3,Phg5,AzaGly7,Arg(Me)9,Trp10]MS10 1250.6 1250.6 16.8 c 531 des(1-3)-3-Phenylpropionyl-[Pic(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 1049.6 1049.6 16.4 c 532 des(1-3)-3-Phenylpropionyl-[Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 1021.8 1021.5 14.4 c 533 des(1-3)-3-Phenylpropionyl-[D-Pro5,AzaGly7,Arg(Me)9,Trp10]MS10 1035.7 1035.6 15.2 c 534 des(1-3)-Cyclopropanecarbonyl-[AzaGly7,Arg(Me)9,Trp10]MS10 961.6 961.5 10.7 c 535 des(1-3)-2-Naphthoyl-[AzaGly7,Arg(Me)9,Trp10]MS10 1047.6 1047.5 14.7 c 536 [Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 1360.3 1360.7 14 e 537 Arg-[Arg1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 1516.5 1516.8 13.4 e 538 Arg-[Acp1,D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 1473.8 1473.8 13.9 e 539 des(1)-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 1254.7 1254.7 18.7 e 540 des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 1242.4 1242.6 11.8 c 541 D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1525.8 1525.8 16.7 e 542 D-Arg-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1681.9 1681.9 16.3 e 545 des(1-3)-Benzoyl-[Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 1015.7 1015.5 13 c 546 des(1-3)-3-Phenylpropionyl-[Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 1067.6 1067.5 15.2 c 547 des(1)-[D-Tyr2,D-Pya(4)3,Ser(Ac)5,AzaGly7,Arg(Me)9,Trp10]MS10 1246.6 1246.7 9.4 c 548 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9,10Ψ,CSNH]MS10 1181.5 1181.6 14.9 e 550 Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.7 1298.6 13.6 c 551 Ac-D-Arg-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1567.8 1567.8 12.4 c 552 D-Dap-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1455.8 1455.8 11.5 c 553 D-Nle-[Acp1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1482.5 1482.8 13.3 c 554 D-Arg-[b-Ala1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1483.7 1483.8 16.5 e 555 D-Arg-[g-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1497.7 1497.8 16.6 e 556 D-Arg-D-Arg-[g-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1654 1653.9 15.7 e 557 D-Arg-D-Arg-[g-Abu1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1809.8 1810 15.6 e 558 Ac-des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9,Trp10]MS10 1284.6 1284.6 13.3 c 559 3-(4-Hydroxyphenyl)propionyl-des(1-2)-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1241.3 1241.6 14.4 c 561 D-Arg-[Acp1,D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 1482.8 1482.8 17.5 e 562 Ac-des(1)-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1260.4 1260.4 15.5 e 563 Ac-des(1)-[D-Tyr2,D-Trp3,Aze(2)5,AzaGly7,Arg(Me)9,Trp10]MS10 1280.6 1280.6 19.1 e 564 Ac-des(1)-[D-Tyr2,D-Trp3,Val5,AzaGly7,Arg(Me)9,Trp10]MS10 1296.5 1296.7 19.9 e 565 Benzoyl-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1360.8 1360.7 15.7 c 566 Cyclopropanecarbonyl-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1324.8 1324.7 14.5 c 567 Butyryl-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1326.8 1326.7 14.8 c 568 Ac-[D-Arg1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1454.7 1454.7 17.2 e 569 Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,6Ψ7,CH2NH,Arg(Me)9,Trp10]MS10 1283.7 1283.7 17.7 e 570 Me-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1270.6 1270.6 16.5 c 571 Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,]MS10 1259.5 1259.6 13.2 c 572 des(1)-[D-Trp2,D-Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 1227.6 1227.6 10.1 c 573 Ac-des(1)-[D-Tyr2,D-Trp3,Abu4,AzaGly7,Arg(Me)9,Trp10]MS10 1255.6 1255.6 19.4 e 576 Ac-des(1)-[D-Tyr2,D-Trp3,Gln4,AzaGly7,Arg(Me)9,Trp10]MS10 1298.8 1298.6 18.2 e 577 Ac-des(1)-[D-Tyr2,D-Trp3,Sor4,AzaGly7,Arg(Me)9,Trp10]MS10 1257.7 1257.6 18.8 c 578 Ac-des(1)-[D-Tyr2,D-Trp3,Thr4,AzaGly7,Arg(Me)9,Trp10]MS10 1271.6 1271.6 18.8 e 579 Ac-des(1)-[D-Tyr2,D-Trp3,Alb4,AzaGly7,Arg(Me)9,Trp10]MS10 1299.5 1299.6 19 e 580 Ac-des(1)-[D-Tyr2,D-Trp3,Ser(Me)5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.4 1298.6 19.3 e Comp. HPLC HPLC Syn. No. Structure M + H+ (obs.) M + H+ (cal.) (min.) mode Proc. 584 des(1)-Ac-[D-Tyr2,D-Trp3,Dap(Ac)4,AzaGly7,Arg(Me)9,Trp10]MS10 1298.7 1298.6 18.7 e X 585 des(1)-Ac-[D-Tyr2,D-Trp3,Dap(For)4,AzaGly7,Arg(Me)9,Trp10]MS10 1284.7 1284.6 17.9 c X 586 des(1)-Ac-[D-Tyr2,Thr5,D-Phe5,AzaGly7,Arg(Me)9,Trp10]MS10 W 589 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Nal(2)10]MS10 1309.6 1309.6 15.2 c W 590 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Thi10]MS10 1265.5 1265.6 13.4 c W 591 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Tyr10]MS10 1275.5 1275.6 12.2 c W 592 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 1277.5 1277.6 14 c W 594 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Hph10]MS10 1273.8 1273.6 14.6 c W 597 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS10 1298.8 1298.7 14.1 c W 598 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Arg(Me)9,Trp10]MS10 1297.5 1297.6 18.5 e H + W 599 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Orn9,Trp10]MS10 1242.4 1242.6 17.8 c G + W 600 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Trp10]MS10 1284.7 1284.6 17.9 c G + W 601 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,D-Phe6,Arg(Me)9,Trp10]MS10 1297.6 1297.6 18.2 c H + W 602 des(1)-Ac-[D-NMeTyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1312.7 1312.7 19 c W 603 des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,D-Phe6,AzaGly7,Arg(Me)9,Trp10]MS1 1260.6 1260.6 15.3 e W 604 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Tos)9,Trp10]MS10 1438.6 1438.6 20.5 e G + W 605 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(NO2)9,Trp10]MS10 1329.4 1329.6 18.7 e G + W 607 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)asym9,Trp10]MS10 1312.9 1312.7 18.1 e W 608 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me2)sym9,Trp10]MS10 1312.3 1312.7 18.1 c W 609 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Et)9,Trp10]MS10 1312.8 1312.7 17.7 c W 610 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys(Me2)9,Trp10]MS10 1284.9 1284.7 17.7 e G + W 611 des(1)-Ac-[Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1260.9 1260.6 14.4 e W 612 des(1)-For-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1284.7 1284.6 17.8 c T + W 613 des(1)-Propionyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1312.6 1312.7 18.3 c T + W 614 des(1)-Amidino-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.4 1298.7 16.9 e J + W 615 des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1299 1298.6 13.9 c W 616 des(1)-Ac-[D-Ala2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1206.8 1206.4 13.1 c W 617 des(1)-Ac-[D-Leu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1248.9 1248.7 15.5 c W 618 des(1)-Ac-[D-Phe2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1282.7 1282.6 15.8 c W 619 des(1)-Ac-[D-Nal(1)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1332.6 1332.7 17.6 c W 620 des(1)-Ac-[D-Nal(2)2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1332.4 1332.7 17.7 c W 621 des(1)-Ac-[D-Lys2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1263.5 1263.7 11.3 c W 622 des(1)-Ac-[D-Glu2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1264.6 1264.4 12.7 c W 623 des(1)-Ac-[D-Tyr2,Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.9 1298.6 14.2 c W 624 des(1)-Ac-[D-Tyr2,Pya(4)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1260.8 1260.6 10.2 c W 625 des(1)-Ac-[D-Tyr2,D-Ala3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1183.8 1183.6 11.4 c W 626 des(1)-Ac-[D-Tyr2,D-Leu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1226 1225.6 13.3 c W 627 des(1)-Ac-[D-Tyr2,D-Phe3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1259.9 1259.6 13.8 c W 628 des(1)-Ac-[D-Tyr2,D-Thr3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1213.9 1213.6 11.1 c W 629 des(1)-Ac-[D-Tyr2,D-Lys3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1240.9 1240.7 10.1 c W 630 des(1)-Ac-[D-Tyr2,D-Glu3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1241.9 1241.6 11.2 c W 631 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Ala6,AzaGly7,Arg(Me)9,Trp10]MS10 1222.9 1222.6 11.6 c W 632 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Leu6,AzaGly7,Arg(Me)9,Trp10]MS10 1265 1264.7 13.5 c W 633 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Lys6,AzaGly7,Arg(Me)9,Trp10]MS10 1279.8 1279.7 10.4 c W 634 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Glu6,AzaGly7,Arg(Me)9,Trp10]MS10 1280.8 1280.6 11.5 c W 635 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Pya(4)3,AzaGly7,Arg(Me)9,Trp10]MS10 1299.9 1299.6 10.5 c W 636 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,McPhe6,AzaGly7,Arg(Me)9,Trp10]MS10 1312.4 1312.7 15.4 c W 637 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 1316.5 1316.6 14.4 c W 638 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Phe(4F)6,AzaGly7,Arg(Me)9,Trp10]MS10 1278.6 1278.6 10.7 c W 639 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Lys9,Trp10]MS10 1256.9 1256.6 17.5 c G + W 640 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,D-Leu8,Arg(Me)9,Trp10]MS10 1298.7 1298.6 17.6 e W 641 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ala8,Arg(Me)9,Trp10]MS10 1256.9 1256.6 16.5 e W 642 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Val8,Arg(Me)9,Trp10]MS10 1284.5 1284.6 17.4 c W 643 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Phe8,Arg(Me)9,Trp10]MS10 1332.4 1332.6 18.3 c W 644 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ser8,Arg(Me)9,Trp10]MS10 1272.9 1272.6 15.5 e W 645 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har9,Trp10]MS10 1299.1 1298.6 17.7 e G + W 646 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Har(Me)9,Trp10]MS10 1313.1 1312.7 17.9 e W 647 des(1)-Ac-[D-Tyr2,D-Trp3,Asp4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1299.9 1299.6 18.2 e W 648 [Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1313.6 1313.7 16 c W 649 Ac-[Gly1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1355.9 1355.7 17.4 c W 650 [D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1419.8 1419.7 16.6 e W 651 Ac-[D-Tyr1,D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1461.4 1461.7 18 e W 652 pGlu-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1367.4 1367.7 17.6 e W 653 des(1)-Ac-[D-Tyr2,D-Trp3,D-Asn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.8 1298.6 18.2 c W 654 des(1)-Ac-[D-Tyr2,D-Trp3,D-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.8 1298.6 17.6 e W 655 des(1)-Ac-[D-Tyr2,D-Trp3,MeAsn4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1312.8 1312.7 18.3 e W 656 des(1)-Ac-[D-Tyr2,D-Trp3,MeSer5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.8 1298.6 17.8 e W 657 des(1)-Ac-[D-Tyr2,D-Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1209.2 1209.6 12.4 c W 658 des(1)-Ac-[D-Tyr2,D-Pya(2)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1260.3 1260.6 10.4 c W 659 des(1)-Ac-[D-Tyr2,D-Trp3,allo-Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.8 1298.6 17.9 c W 660 des(1)-Ac-[D-Tyr2,D-Pya(3)3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1260.8 1260.6 10.3 c W 661 des(1)-Ac-[D-Tyr2,D-Pro3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1209.8 1209.6 11.5 c W 662 des(1)-Ac-[D-Tyr2,Tic3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1271.4 1271.4 13.9 c W 663 des(1)-Ac-[D-Trp2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1321.7 1321.7 15.9 c W 664 des(1)-Ac-[Tyr2,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1298.7 1298.6 14.1 c W 665 des(1-2)-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1093.7 1093.6 11.1 c O 666 des(1-2)-Ac-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1135.7 1135.6 13.4 c T + W 667 des(1-2)-Hexanoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1191.4 1191.6 17.2 c T + W 668 des(1-2)-Cyclohexanecarbonyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS 1203.3 1203.6 17.1 c T + W 669 des(1-2)-Benzoyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1197.8 1197.6 16 c T + W 670 des(1-2)-3-Pyridinepropionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS1 1226.7 1226.6 11.5 c T + W 671 des(1-2)-Adipionyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1221.6 1221.6 13.5 c T + W 672 des(1)-Ac-[D-Tyr2,MeTrp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1312.9 1312.7 14.5 c W 674 des(1)-Ac-[Acp2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1206.7 1206.7 11.5 c T + W 675 [D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1419.6 1419.7 16.8 e W 676 Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1461.4 1461.7 18 e W 677 Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Nva8,Arg(Me)9,Trp10]MS10 1284.9 1284.6 17.1 e W 678 Ac-des(1)-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Ile8,Arg(Me)9,Trp10]MS10 1298.9 1298.6 17.8 e W 679 des(1-2)-Amidino-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1135.7 1135.5 11.7 c J + W 680 des(1-2)-Glycoloyl-[D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1151.9 1151.6 12.9 c W 681 des(1)-Glycoloyl-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,Trp10]MS10 1314.8 1314.6 13.5 c W 682 des(1)-Ac-[D-Tyr2,D-,Trp3,Thr5AzaGly7,Gln8,Arg(Me)9,Trp10]MS10 1313.9 1313.6 15.7 e W 685 des(1)-Ac-[D-Tyr2,D-Pya(4)3,Thr5,AzaGly7,Arg(Me)9]MS10 1221.8 1221.6 9.9 c W 686 des(1)-Ac-[D-Tyr2,D-Trp3,Gly4,AzaGly7,Arg(Me)9,Trp10]MS10 1227.8 1227.6 14.2 c W 688 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Pya(4)9,Trp10]MS10 1276.8 1276.6 13.9 c W 689 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Arg(Me)9,D-Trp10]MS10 1298.8 1298.6 13.6 c W 691 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr6,AzaGly7,Arg(Me)9,Trp10]MS10 1314.4 1314.6 12.3 c W 692 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Trp6,AzaGly7,Arg(Me)9,Trp10]MS10 1337.5 1337.7 14 c W 693 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Tyr(Me)6,AzaGly7,Arg(Me)9,Trp10]MS10 1328.9 1328.7 13.9 c W 694 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Nal(2)6,AzaGly7,Arg(Me)9,Trp10]MS10 1348.9 1348.7 15.7 c W 695 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Thi6,AzaGly7,Arg(Me)9,Trp10]MS10 1304.7 1304.6 13.6 c W 696 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Cha6,AzaGly7,Arg(Me)9,Trp10]MS10 1304.9 1304.7 15.3 c W 698 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,Abu8,Arg(Me)9,Trp10]MS10 1270.7 1270.6 16.7 c W 699 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,AzaGly7,γMeLeu8,Arg(Me)9,Trp10]MS10 1312.6 1312.7 18.4 e W 700 des(1)-Ac-[D-Tyr2,D-Trp3,Thr5,Aib8..Arg(Me)9,Trp10]MS10 1269.9 1269.6 16.8 e E 701 des(1)-Ac-[D-Tyr2,D-Trp3,Dap4,AzaGly7,Arg(Me)9,Trp10]MS10 1257 1256.6 16.7 e W 702 des(1)-Ac-[D-Tyr2,D-Trp3,Asp(NHMe)4,Thr5,AzaGly7,Arg(Me)9,Trp10]MS 1312.8 1312.7 17.9 e W

FORMULATION EXAMPLE 1

(1) Compound No. 305 10.0 mg (2) Lactose 60.0 mg (3) Cornstarch 35.0 mg (4) Gelatin  3.0 mg (5) Magnesium stearate  2.0 mg

A mixture of 10.0 mg of Compound No. 305, 60.0 mg of lactose and 35.0 mg of cornstarch is granulated with 0.03 ml of 10% aqueous gelatin solution (3.0 mg as gelatin) through a sieve of 1 mm mesh, dried at 40° C. and sieved again. The granules thus obtained are mixed with 2.0 mg of magnesium stearate and compressed. The resulting core tablets are coated with sugar-coating of an aqueous suspension of sucrose, titanium dioxide, talc and gum arabic. The coated tablets are polished with yellow beeswax to obtain coated tablets.

FORMULATION EXAMPLE 2

(1) Compound No. 305 10.0 mg (2) Lactose 70.0 mg (3) Cornstarch 50.0 mg (4) Soluble starch  7.0 mg (5) Magnesium stearate  3.0 mg

A mixture of 10 mg of Compound 305 and 3.0 mg of magnesium stearate is granulated with 0.07 ml of an aqueous solution of a soluble starch (7.0 mg as soluble starch), dried, and mixed with 70.0 mg of lactose and 50.0 mg of cornstarch. The mixture is compressed to obtain tablets.

FORMULATION EXAMPLE 3

(1) Compound No. 305 5.0 mg (2) Salt 20.0 mg (3) Distilled water to make the whole volume 2 ml

After 5.0 mg of Compound No. 305 and 20.0 mg of salt are dissolved in distilled water, water is added to the solution to make the whole volume 2.0 ml. The solution is filtered and filled in a 2 ml ampoule under aseptic conditions. The ampoule is sterilized and sealed to obtain a solution for injection.

FORMULATION EXAMPLE 4

(1) Compound No. 550 10.0 mg (2) Lactose 60.0 mg (3) Cornstarch 35.0 mg (4) Gelatin  3.0 mg (5) Magnesium stearate  2.0 mg

A mixture of 10.0 mg of Compound No. 550, 60.0 mg of lactose and 35.0 mg of cornstarch is granulated with 0.03 ml of 10% aqueous gelatin solution (3.0 mg as gelatin) through a sieve of 1 mm mesh, dried at 40° C. and sieved again. The granules thus obtained are mixed with 2.0 mg of magnesium stearate and compressed. The resulting core tablets are coated with sugar-coating of an aqueous suspension of sucrose, titanium dioxide, talc and gum arabic. The coated tablets are polished with yellow beeswax to obtain coated tablets.

FORMULATION EXAMPLE 5

(1) Compound No. 550 10.0 mg (2) Lactose 70.0 mg (3) Cornstarch 50.0 mg (4) Soluble starch  7.0 mg (5) Magnesium stearate  3.0 mg

A mixture of 10 mg of Compound 550 and 3.0 mg of magnesium stearate is granulated with 0.07 ml of an aqueous solution of a soluble starch (7.0 mg as soluble starch), dried, and mixed with 70.0 mg of lactose and 50.0 mg of cornstarch. The mixture is compressed to obtain tablets.

FORMULATION EXAMPLE 6

(1) Compound No. 550 5.0 mg (2) Salt 20.0 mg (3) Distilled water to make the whole volume 2 ml

After 5.0 mg of Compound No. 550 and 20.0 mg of salt are dissolved in distilled water, water is added to the solution to make the whole volume 2.0 ml. The solution is filtered and filled in a 2 ml ampoule under aseptic conditions. The ampoule is sterilized and sealed to obtain a solution for injection.

FORMULATION EXAMPLE 7

(1) Compound No. 562 10.0 mg (2) Lactose 60.0 mg (3) Cornstarch 35.0 mg (4) Gelatin  3.0 mg (5) Magnesium stearate  2.0 mg

A mixture of 10.0 mg of Compound No. 562, 60.0 mg of lactose and 35.0 mg of cornstarch is granulated with 0.03 ml of 10% aqueous gelatin solution (3.0 mg as gelatin) through a sieve of 1 mm mesh, dried at 40° C. and sieved again. The granules thus obtained are mixed with 2.0 mg of magnesium stearate and compressed. The resulting core tablets are coated with sugar-coating of an aqueous suspension of sucrose, titanium dioxide, talc and gum arabic. The coated tablets are polished with yellow beeswax to obtain coated tablets.

FORMULATION EXAMPLE 8

(1) Compound No. 562 10.0 mg (2) Lactose 70.0 mg (3) Cornstarch 50.0 mg (4) Soluble starch  7.0 mg (5) Magnesium stearate  3.0 mg

A mixture of 10 mg of Compound 562 and 3.0 mg of magnesium stearate is granulated with 0.07 ml of an aqueous solution of a soluble starch (7.0 mg as soluble starch), dried, and mixed with 70.0 mg of lactose and 50.0 mg of cornstarch. The mixture is compressed to obtain tablets.

FORMULATION EXAMPLE 9

(1) Compound No. 562 5.0 mg (2) Salt 20.0 mg (3) Distilled water to make the whole volume 2 ml

After 5.0 mg of Compound No. 562 and 20.0 mg of salt are dissolved in distilled water, water is added to the solution to make the whole volume 2.0 ml. The solution is filtered and filled in a 2 ml ampoule under aseptic conditions. The ampoule is sterilized and sealed to obtain a solution for injection.

FORMULATION EXAMPLE 10

(1) Compound No. 571 10.0 mg (2) Lactose 60.0 mg (3) Cornstarch 35.0 mg (4) Gelatin  3.0 mg (5) Magnesium stearate  2.0 mg

A mixture of 10.0 mg of Compound No. 571, 60.0 mg of lactose and 35.0 mg of cornstarch is granulated with 0.03 ml of 10% aqueous gelatin solution (3.0 mg as gelatin) through a sieve of 1 mm mesh, dried at 40° C. and sieved again. The granules thus obtained are mixed with 2.0 mg of magnesium stearate and compressed. The resulting core tablets are coated with sugar-coating of an aqueous suspension of sucrose, titanium dioxide, talc and gum arabic. The coated tablets are polished with yellow beeswax to obtain coated tablets.

FORMULATION EXAMPLE 11

(1) Compound No. 571 10.0 mg (2) Lactose 70.0 mg (3) Cornstarch 50.0 mg (4) Soluble starch  7.0 mg (5) Magnesium stearate  3.0 mg

A mixture of 10 mg of Compound 571 and 3.0 mg of magnesium stearate is granulated with 0.07 ml of an aqueous solution of a soluble starch (7.0 mg as soluble starch), dried, and mixed with 70.0 mg of lactose and 50.0 mg of cornstarch. The mixture is compressed to obtain tablets.

FORMULATION EXAMPLE 12

(1) Compound No. 571 5.0 mg (2) Salt 20.0 mg (3) Distilled water to make the whole volume 2 ml

After 5.0 mg of Compound No. 571 and 20.0 mg of salt are dissolved in distilled water, water is added to the solution to make the whole volume 2.0 ml. The solution is filtered and filled in a 2 ml ampoule under aseptic conditions. The ampoule is sterilized and sealed to obtain a solution for injection.

FORMULATION EXAMPLE 13

(1) Compound No. 579 10.0 mg (2) Lactose 60.0 mg (3) Cornstarch 35.0 mg (4) Gelatin  3.0 mg (5) Magnesium stearate  2.0 mg

A mixture of 10.0 mg of Compound No. 579, 60.0 mg of lactose and 35.0 mg of cornstarch is granulated with 0.03 ml of 10% aqueous gelatin solution (3.0 mg as gelatin) through a sieve of 1 mm mesh, dried at 40° C. and sieved again. The granules thus obtained are mixed with 2.0 mg of magnesium stearate and compressed. The resulting core tablets are coated with sugar-coating of an aqueous suspension of sucrose, titanium dioxide, talc and gum arabic. The coated tablets are polished with yellow beeswax to obtain coated tablets.

FORMULATION EXAMPLE 14

(1) Compound No. 579 10.0 mg (2) Lactose 70.0 mg (3) Cornstarch 50.0 mg (4) Soluble starch  7.0 mg (5) Magnesium stearate  3.0 mg

A mixture of 10 mg of Compound 579 and 3.0 mg of magnesium stearate is granulated with 0.07 ml of an aqueous solution of a soluble starch (7.0 mg as soluble starch), dried, and mixed with 70.0 mg of lactose and 50.0 mg of cornstarch. The mixture is compressed to obtain tablets.

FORMULATION EXAMPLE 15

(1) Compound No. 579 5.0 mg (2) Salt 20.0 mg (3) Distilled water to make the whole volume 2 ml

After 5.0 mg of Compound No. 579 and 20.0 mg of salt are dissolved in distilled water, water is added to the solution to make the whole volume 2.0 ml. The solution is filtered and filled in a 2 ml ampoule under aseptic conditions. The ampoule is sterilized and sealed to obtain a solution for injection.

FORMULATION EXAMPLE 16

(1) Compound No. 585 10.0 mg (2) Lactose 60.0 mg (3) Cornstarch 35.0 mg (4) Gelatin  3.0 mg (5) Magnesium stearate  2.0 mg

A mixture of 10.0 mg of Compound No. 585, 60.0 mg of lactose and 35.0 mg of cornstarch is granulated with 0.03 ml of 10% aqueous gelatin solution (3.0 mg as gelatin) through a sieve of 1 mm mesh, dried at 40° C. and sieved again. The granules thus obtained are mixed with 2.0 mg of magnesium stearate and compressed. The resulting core tablets are coated with sugar-coating of an aqueous suspension of sucrose, titanium dioxide, talc and gum arabic. The coated tablets are polished with yellow beeswax to obtain coated tablets.

FORMULATION EXAMPLE 17

(1) Compound No. 585 10.0 mg (2) Lactose 70.0 mg (3) Cornstarch 50.0 mg (4) Soluble starch  7.0 mg (5) Magnesium stearate  3.0 mg

A mixture of 10 mg of Compound 585 and 3.0 mg of magnesium stearate is granulated with 0.07 ml of an aqueous solution of a soluble starch (7.0 mg as soluble starch), dried, and mixed with 70.0 mg of lactose and 50.0 mg of cornstarch. The mixture is compressed to obtain tablets.

FORMULATION EXAMPLE 18

(1) Compound No. 585 5.0 mg (2) Salt 20.0 mg (3) Distilled water to make the whole volume 2 ml

After 5.0 mg of Compound No. 585 and 20.0 mg of salt are dissolved in distilled water, water is added to the solution to make the whole volume 2.0 ml. The solution is filtered and filled in a 2 ml ampoule under aseptic conditions. The ampoule is sterilized and sealed to obtain a solution for injection.

TEST EXAMPLE 1 Assay for hOT7T175 Receptor Binding Activity (1) Preparation of Cy-5-Labeled Metastin (40-54)

A synthetic peptide having 40-54 amino acid sequence in the amino acid sequence of metastin, into which Cy-5 was introduced via the 1-amino group of lysine located at the amino terminus and the carboxyl terminus was amidated, was prepared in accordance with the synthesis technique Amersham Bioscience, Inc. Using this synthetic peptide, a test for binding inhibition was carried out.

Sequence: (Cy-5)-KDLPNYNWNSFGLRF-NH₂

(2) Test for Binding Inhibition Using a Test Compound, Cy-5-Labeled Metastin (40-54) and hOT7T175-Expressed Cho Cell

hOT7T175-Expressed CHO cells were cultured in MEM-α medium (nucleic acid-free) containing 10% dialyzed serum. The medium was removed and the adhered cells were washed with PBS. Then, PBS containing 5 mM EDTA was added and the cells were scraped from a flask with a cell scraper.

After centrifugation, the cells were suspended at 1.11×10⁵ cells/ml in assay buffer (10 mM HEPES pH 7.4, 140 mM NaCl, 2.5 mM CaCl₂, 3 mM MgCl₂, 0.5% BSA, 0.01% NaN₃) and Cy-5-labeled metastin (40-54) was added to the suspension in a final concentration of 1 nM. To each well of a 96-Well Black Clear Bottom Microplate (Applied Biosystems, Inc.), 10 μL of assay buffer containing 1% dimethylsulfoxide was added to examine total binding, 10 μL of 10 μM non-labeled peptide (having the same amino acid sequence as that of labeled one) solution diluted with assay buffer to examine non-specific binding, and 10 μL of a test compound diluted with assay buffer to examine a binding inhibition activity of the test compound, and furthermore, 90 μL each of the cell suspension was dispensed to each well. After an hour, the level of Cy-5-labeled metastin (40-54) bound to the cells was determined by the FMAT 8100 HTS system (Applied Biosystems, Inc.). Specific binding is calculated as non-specific binding subtracted from total binding. The binding inhibition activity of a test compound is shown by a ratio of the value obtained by subtracting a measured value in presence of a test compound from the total binding to the specific binding. The receptor binding activity of test compound is shown in TABLES 13 through 18.

TABLE 13 Com- pound Number IC50(M) 1 Metastin 1.7E−07 3 MS10 6.5E−09 4 des(1)-MS10 2.6E−07 17 [Pya(4)10]MS10 6.6E−12 18 [Tyr(Me)10]MS10 7.7E−09 19 [Phe(2F)10]MS10 8.6E−09 23 [Tyr5]MS10 4.0E−07 24 [Leu5]MS10 8.3E−10 30 Acetyl-MS10 3.1E−08 31 Fmoc-MS10 9.3E−07 32 Leu-Pro-Asn-MS10 2.5E−08 39 [D-Asn4]MS10 8.3E−07 40 [D-Trp3]MS10 1.9E−08 41 [D-Asn2]MS10 2.1E−07 42 [D-Tyr1]MS10 5.7E−08 44 [Lys9]MS10 1.9E−07 50 [Ala7]MS10 1.9E−07 54 des(1-2)-Fmoc-MS10 4.5E−07 57 [Asp2]MS10 1.0E−07 58 [Tyr2]MS10 1.6E−08 59 [Leu2]MS10 3.4E−07 60 [Pya(3)10]MS10 1.7E−07 61 [Phe(4F)10]MS10 1.3E−08 67 [Ala3]MS10 2.7E−08 68 [Leu3]MS10 7.7E−09 69 [Ser3]MS10 8.3E−08 70 [Asp3]MS10 2.0E−07 71 [Lys3]MS10 6.6E−08 72 [Ala1]MS10 5.4E−07 73 [Leu1]MS10 2.2E−07 75 [Asp1]MS10 8.8E−07

TABLE 14 77 [Phe(4CN)10]MS10 7.4E−09 78 [Trp(CHO)3, Phe(4CN)10]MS10 2.5E−08 82 [Arg(Me)9]MS10 4.1E−09 83 [Arg(Me2)asy9]MS10 2.5E−08 97 [Har9]MS10 3.7E−07 101 [Ser7]MS10 1.0E−07 105 [Nle8]MS10 8.8E−07 107 [Val8]MS10 1.2E−07 109 [Tyr10]MS10 2.3E−08 110 [Nal(2)10]MS10 2.4E−08 111 [Phe(F5)10]MS10 1.4E−07 112 [Cha10]MS10 3.7E−07 114 des(1-3)-3-(3-Indolyl)propionyl-MS10 5.5E−07 128 [10Ψ,CSNH]MS10 5.5E−08 129 [Arg(Me2)sy9]MS10 8.3E−08 130 [Phe(4Cl)10]MS10 4.2E−08 131 [Phe(4NH2)10]MS10 1.2E−07 132 [Phe(4NO2)10]MS10 9.3E−08 133 [Nal(1)10]MS10 3.3E−07 134 [Trp10]MS10 1.1E−07 141 [D-Tyr1,Arg(Me)9]MS10 5.1E−08 142 [D-Tyr1,D-Trp3,Arg(Me)9]MS10 2.6E−08 143 [D-Trp3,Arg(Me)9]MS10 7.7E−09 145 des(1-2)-Fmoc-[Arg(Me)9]MS10 1.2E−07 146 [10Ψ,CSNH,D-Tyr1]MS10 3.7E−07 150 [Tyr6]MS10 3.2E−07 151 [Nal(1)6]MS10 3.0E−07 152 [Nal(2)6]MS10 1.8E−07 153 [Phe(F5)6]MS10 3.9E−07 154 [Phe(4F)6]MS10 6.0E−08 156 [Cha6]MS10 4.9E−08 163 [6Ψ7,CH2NH]MS10 2.5E−07 166 [6Ψ7,CSNH]MS10 9.4E−09 169 [D-Tyr1,Ala3,Arg(Me)9]MS10 1.6E−07 170 [D-Tyr1,Ser3,Arg(Me)9]MS10 2.6E−07

TABLE 15 171 [D-Tyr1,Cha3,Arg(Me)9]MS10 1.1E−07 174 [D-Tyr1,Arg(Me)9,Trp10]MS10 4.2E−07 176 [AzaGly7]MS10 5.2E−08 181 [D-Tyr1,Cha3,6,Arg(Me)9]MS10 1.9E−08 182 [D-Tyr1,Cha3,6,Arg(Me)9,Trp10]MS10 9.8E−08 186 [Trp(CHO)10]MS10 4.6E−07 187 [Abu8]MS10 7.2E−07 189 [Ala(3-Bzt)10]MS10 2.3E−07 190 [D-Tyr1,Cha3,AzaGly7,Arg(Me)9]MS10 1.2E−08 191 [D-Tyr1,Ser3,AzaGly7,Arg(Me)9]MS10 3.0E−07 192 [D-Tyr1,Arg(Et)9]MS10 5.3E−07 193 [D-Tyr1,Arg(n-Pr)9]MS10 9.2E−07 194 [D-Tyr1,Arg(Ac)9]MS10 2.1E−07 197 [Phe(3F)10]MS10 1.7E−07 198 [Phe(3,4F2)10]MS10 1.7E−07 199 [Phe(3,4Cl2)10]MS10 4.7E−07 200 [Phe(3CF3)10]MS10 3.4E−07 201 [Ala(2-Qui)10]MS10 8.2E−07 203 [D-Tyr1,Cha6,Arg(Me)9]MS10 3.7E−08 204 [D-Tyr1,Ala7,Arg(Me)9]MS10 6.8E−07 205 [D-Tyr1,Thr3,Arg(Me)9]MS10 2.6E−07 206 [D-Tyr1,Ile3,Arg(Me)9]MS10 8.5E−08 208 [D-Tyr1,Thr4,Arg(Me)9]MS10 8.3E−07 210 [D-Tyr1,Ala4,Arg(Me)9]MS10 7.3E−07 211 [D-Tyr1,Thr5,Arg(Me)9]MS10 4.4E−08 212 [D-Tyr1,Ala5,Arg(Me)9]MS10 3.6E−08 213 [D-Tyr1,Val8,Arg(Me)9]MS10 1.9E−07 214 [D-Tyr1,Gln2,Arg(Me)9]MS10 3.9E−07 215 [D-Tyr1,Thr2,Arg(Me)9]MS10 2.5E−07 216 des(1)-[D-Asn2,Arg(Me)9]MS10 7.0E−07 217 des(1)-[D-Tyr2,Arg(Me)9]MS10 2.5E−07 220 [Arg(Et)9]MS10 3.3E−07 221 [D-Tyr1,Thr3,AzaGly7,Arg(Me)9]MS10 9.5E−08 222 des(1)-[D-Tyr2,AzaGly7,Arg(Me)9]MS10 3.3E−08 223 des(1-2)-[D-Trp3,Arg(Me)9]MS10 7.6E−07

TABLE 16 224 des(1)-[D-Tyr2,D-Trp3,Arg(Me)9]MS10 1.4E−07 225 des(1)-[D-Asn2,D-Trp3,Arg(Me)9]MS10 4.1E−07 226 des(1)-[D-Tyr2,Ser3,Arg(Me)9]MS10 1.0E−07 227 des(1)-[D-Tyr2,Thr3,Arg(Me)9]MS10 4.8E−08 228 des(1)-[D-Tyr2,Ile3,Arg(Me)9]MS10 4.0E−08 229 [D-Tyr1,Val3,Arg(Me)9]MS10 1.3E−07 230 [D-Tyr1,D-Asn2,Arg(Me)9]MS10 2.5E−07 231 [D-Tyr1,D-Asn2,D-Trp3,Arg(Me)9]MS10 5.5E−08 232 [D-Tyr1,AzaGly7,Arg(Me)9]MS10 4.9E−08 233 [D-Tyr1,Ile3,AzaGly7,Arg(Me)9]MS10 2.3E−08 234 [D-Tyr1,Val3,AzaGly7,Arg(Me)9]MS10 4.7E−08 235 [D-Tyr1,Ala3,AzaGly7,Arg(Me)9]MS10 1.0E−07 236 [D-Tyr1,D-Trp3,AzaGly7,Arg(Me)9]MS10 4.2E−08 237 [D-Tyr1,D-Asn2,AzaGly7,Arg(Me)9]MS10 2.7E−08 238 [D-Tyr1,D-Asn2,D-Trp3,AzaGly7,Arg(Me)9]MS10 4.9E−08 239 des(1)-[D-Tyr2,Ser3,AzaGly7,Arg(Me)9]MS10 1.2E−07 240 des(1)-[D-Tyr2,Ile3,AzaGly7,Arg(Me)9]MS10 1.7E−08 241 des(1)-[D-Tyr2,Thr3,AzaGly7,Arg(Me)9]MS10 5.6E−08 242 des(1)-[D-Tyr2,D-Trp3,AzaGly7,Arg(Me)9]MS10 7.0E−08 244 [D-Tyr1,Phe3,AzaGly7,Arg(Me)9]MS10 7.7E−08 245 [D-Tyr1,Nal(1)3,AzaGly7,Arg(Me)9]MS10 9.8E−08 246 [D-Tyr1,Nal(2)3,AzaGly7,Arg(Me)9]MS10 7.1E−09 247 [D-Tyr1,Phe(2Cl)3,AzaGly7,Arg(Me)9]MS10 4.5E−08 248 [D-Tyr1,Phe(3Cl)3,AzaGly7,Arg(Me)9]MS10 5.8E−08 249 [D-Tyr1,Phe(4Cl)3,AzaGly7,Arg(Me)9]MS10 1.5E−07 250 [D-Tyr1,Phe(4NH2)3,AzaGly7,Arg(Me)9]MS10 3.7E−09 251 [D-Tyr1,Pya(3)3,AzaGly7,Arg(Me)9]MS10 8.7E−08 252 [D-Tyr1,D-Ala3,AzaGly7,Arg(Me)9]MS10 5.8E−07 253 [D-Tyr1,Pro3,AzaGly7,Arg(Me)9]MS10 2.7E−08 254 des(1)-[D-Tyr2,Phe3,AzaGly7,Arg(Me)9]MS10 1.1E−08 255 des(1)-[D-Tyr2,Nal(2)3,AzaGly7,Arg(Me)9]MS10 3.3E−08 256 des(1)-[D-Pya(3)2,Phe3,AzaGly7,Arg(Me)9]MS10 2.2E−08 257 [D-Tyr1,D-Asn2,Phe3,AzaGly7,Arg(Me)9]MS10 4.0E−08 258 [D-Pya(3)1,AzaGly7,Arg(Me)9]MS10 9.0E−08 259 [D-Ala1,AzaGly7,Arg(Me)9]MS10 2.5E−07

TABLE 17 260 des(1-3)-1-(3-Indolyl)propionyl- 3.2E−07 [AzaGly7,Arg(Me)9]MS10 261 [7Ψ8,CH2NH]MS10 3.9E−07 265 des(1-3)-Indole-3-carboxyl- 9.5E−08 [AzaGly7,Arg(Me)9]MS10 266 des(1-3)-Indole-3-acetyl-[AzaGly7,Arg(Me)9]MS10 2.3E−07 267 des(1-3)-4-(34-Indolyl)butyryl- 3.6E−07 [AzaGly7,Arg(Me)9]MS10 268 des(1-3)-Diphenylacetyl-[AzaGly7,Arg(Me)9]MS10 5.5E−07 269 des(1-3)-3-Phenylpropionyl- 4.7E−07 [AzaGly7,Arg(Me)9]MS10 270 Endo-Phe5a-[D-Tyr1,Phe3,AzaGly7,Arg(Me)9]MS10 1.5E−08 271 des(1-2)-[AzaGly7,Arg(Me)9]MS10 1.2E−07 272 des(1-2)-Acetyl-[AzaGly7,Arg(Me)9]MS10 5.4E−07 273 des(1-2)-Amidino-[AzaGly7,Arg(Me)9]MS10 3.0E−07 275 des(1-2)-Acetyl-[Arg3,AzaGly7,Arg(Me)9]MS10 4.1E−07 276 des(1-2)-Acetyl-[Thr3,AzaGly7,Arg(Me)9]MS10 4.8E−07 277 des(1-3)-n-Hexanoyl-[AzaGly7,Arg(Me)9]MS10 5.4E−08 278 des(1-3)-Cyclohexanecarbonyl- 1.1E−07 [AzaGly7,Arg(Me)9]MS10 279 des(1-3)-2-(Indol-3-yl)ethylcarbamoyl- 2.9E−08 [AzaGly7,Arg(Me)9]MS10 281 [D-Tyr1,Pya(2)6,Arg(Me)9]MS10 2.3E−07 283 [D-Tyr1,D-Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 6.9E−10 284 [D-Tyr1,D-Asn2,Thr3,AzaGly7,Arg(Me)9]MS10 3.4E−08 285 [D-Tyr1,Pya(2)3,AzaGly7,Arg(Me)9]MS10 4.0E−08 286 [D-Tyr1,Pya(4)3,AzaGly7,Arg(Me)9]MS10 1.7E−08 287 [D-Tyr1,D-Ser2,AzaGly7,Arg(Me)9]MS10 2.3E−09 288 [D-Tyr1,D-His2,AzaGly7,Arg(Me)9]MS10 7.2E−11 289 [D-Pya(3)2,AzaGly7,Arg(Me)9]MS10-(2-10) 8.4E−09 290 [D-Pya(3)1,D-Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 1.4E−09 291 [D-Pya(3)1,D-Tyr2,Cha3,AzaGly7,Arg(Me)9]MS10 4.1E−10 294 [1Ψ2,CH2NH]MS10 3.0E−08 295 [2Ψ3,CH2NH]MS10 6.8E−07 296 [6Ψ7,CSNH,D-Tyr1,Arg(Me)9]MS10 1.4E−08 297 [D-Tyr1,Thr5,AzaGly7,Arg(Me)9]MS10 9.3E−10 298 [D-Tyr1,D-Asn2,Thr5,AzaGly7,Arg(Me)9]MS10 2.5E−10 299 [1Ψ2,CH2NH,AzaGly7,Arg(Me)9]-MS10 1.2E−09 300 [1Ψ2,CH2NH,D-Trp3,AzaGly7,Arg(Me)9]-MS10 3.8E−09 301 [D-Tyr1,Ala(2-Qui)3,AzaGly7,Arg(Me)9]MS10 1.5E−08

TABLE 18 302 [D-Tyr1,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 7.7E−09 303 [D-Tyr1,D-Asn2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 5.0E−10 304 [D-Asn2,Pya(4)3,AzaGly7,Arg(Me)9]MS10 5.0E−09 305 des(1)-[D-Tyr2,D-Pya(4)3,AzaGly7,Arg(Me)9]MS10 1.3E−09 306 [D-Pya(4)1,D-Asn2,Cha3,AzaGly7,Arg(Me)9]MS10 4.4E−09 307 [7Ψ8,CH2NH,D-Tyr1,Arg(Me)9]MS10 6.4E−08 308 [6Ψ7,CH2NH,D-Tyr1,Arg(Me)9]MS10 3.5E−07 310 [Nar9]MS10 3.1E−07 311 [Nar(Me)9]MS10 4.7E−07 312 [Har(Me)9]MS10 1.0E−07 313 [Dab9]MS10 6.9E−07 314 [Orn9]MS10 4.7E−07 316 [D-Tyr1,D- 2.6E−08 Asn2,Thr3,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 317 [D-Tyr1,D- 2.1E−09 Asn2,Pya(4)3,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 318 [D-Tyr1,AzaGly7,Arg(Me)9,Phe(4F)10]MS10 9.9E−10 319 [6Ψ7,NHCO,D-Tyr1,Arg(Me)9]MS10 9.7E−09 322 des(1-3)-3-Pyridylpropionyl- 5.4E−08 [AzaGly7,Arg(Me)9]MS10 323 des(1-3)-4-Imidazoleacetyl-[AzaGly7,Arg(Me)9]MS10 2.8E−07 328 des(1-3)-D-Glucronyl-[AzaGly7,Arg(Me)9]MS10 4.7E−07

TEST EXAMPLE 2 Assay for Intracellular Ca Ion Level-Increasing Activity Using FLIPR

In accordance with the method described in JPA 2000-312590, the intracellular Ca ion level-increasing activity was measured using FLIPR.

The stable expression cell line rOT7T175 was obtained by transduction of expression plasmid pAK-rOT175 for animal cell into CHO/dhfr cells, using CellPhect Transfection Kit (Amersham Pharmacia Biotech, Inc.). First, 240 μL of Buffer A (attached to CellPhect Transfection Kit) was added to 9.6 μg of plasmid DNA dissolved in 240 μL of distilled water followed by stirring. After the mixture was settled for 10 minutes, 480 μL of Buffer B (attached to CellPhect Transfection Kit) was added to the mixture, which was vigorously stirred to form liposomes containing the DNA. Then, 4×10⁵ CHO/dhfr⁻ cells (obtained from ATCC) were inoculated on a 60 mm Petri dish. After culturing the cells in Ham's F-12 medium (Nissui Seiyaku Co., Ltd.) supplemented with 10% fetal bovine serum (BIO WHITTAKER, Inc.) at 37° C. for 2 days in 5% carbon dioxide gas, 480 μL of the liposomes were dropwise added to the cells in the Petri dish. After culturing the cells at 37° C. for 6 hours in 5% carbon dioxide gas, the cells were washed twice with serum-free Ham's F-12 medium and 3 μL of 15% glycerol was added to the cells in the Petri dish followed by treatment for 2 minutes. The cells were again washed twice with serum-free Ham's F-12 medium followed by incubation in Ham's F-12 medium supplemented with 10% fetal bovine serum at 37° C. for 15 hours in 5% carbon dioxide gas. The cells were dispersed by trypsin treatment to recover from the Petri dish. The recovered cells were inoculated on a 6-well plate in 1.25×10⁴ cells/well and began to incubate at 37° C. in Dulbecco's modified Eagle medium (DMEM) medium (Nissui Seiyaku Co., Ltd.) containing 10% dialyzed fetal bovine serum (JRH BIOSCIENCES, Inc.) in 5% carbon dioxide gas. The plasmid-transfected transformed CHO cells grew in the medium but the non-transfected cells gradually died. The medium was exchanged on Days 1 and 2 to remove the cells died. Approximately 20 colonies of the transformed CHO cells that kept growing on Days 8 to 10 after the incubation were isolated. From the cells in these colonies, cells showing high reactivity with the ligand peptide metastin (hereinafter merely referred to as hOT7T175/CHO) were selected to provide for the following experiment.

The intracellular Ca ion level-increasing activity of the synthetic peptide in hOT7T175/CHO was determined using FLIPR (Molecular Devices, Inc.).

hOT7T175/CHO was subcultured in DMEM supplemented with 10% dialyzed fetal bovine serum (hereinafter abbreviated as dFBS) and provided for the experiment (hereinafter abbreviated as 10% dFBS/DMEM). The hOT7T175/CHO was suspended in 10% dFBS-DMEM in 15×10⁴ cells/ml. The suspension was inoculated on a 96-well plate for FLIPR (Black Plate Clear Bottom, Coster, Inc.) at 200 μl each (3.0×10⁴ cells/200 μl), followed by incubation at 37° C. overnight in a 5% CO₂ incubator. The cells thus incubated were used (hereinafter simply referred to as the cell plate). Then, 21 ml of HANKS/HBSS (9.8 g of HANKS', 0.35 g of sodium hydrogencarbonate, 20 ml of 1M HEPES; after adjusting the pH to 7.4 with 1N sodium hydroxide, the mixture was subjected to sterilization through a filter), 210 μl of 250 μmM Probenecid and 210 μl of fetal bovine serum (FBS) were mixed (HANKS/HBSS-Probenecid-FBS).

Furthermore, 2 vials of Fluo3-AM (50 μg/vial) were dissolved in 21 μL of dimethylsulfoxide and 21 μL of 20% Pluronic acid. The resulting solution was added to and mixed with 10 ml of HANKS/HBSS-Probenecid-FBS described above. After the culture medium was removed, the mixture was dispensed onto the cell plate in 100 μl each/well, followed by incubation at 37° C. for an hour in a 5% CO₂ incubator (pigment loading). The peptide was dissolved in dimethylsulfoxide in 1×10⁻³ M. The peptide solution was diluted with HANKS'/HBSS containing 2.5 mM Probenecid and 0.2% BSA. The dilution was transferred to a 96-well plate for FLIPR (V-Bottom plate, Coster, Inc.) (hereinafter referred to as a sample plate). After completion of the pigment loading onto the cell plate, the cell plate washed 4 times with wash buffer, which was obtained by adding 2.5 mM Probenecid to HANKS'/HBSS, using a plate washer to leave 100 μL of wash buffer after the washing. The cell plate and the sample plate were set in FLIPR and 0.05 ml of a sample from the sample plate was automatically transferred to the cell plate with the FLIPR device to promote the cell response. A change in intracellular calcium ion level for 180 seconds was measured with passage of time.

The intracellular Ca ion level-increasing activity [specific activity to Metastin (1-54)] is shown in TABLES 19 to 23.

TABLE 19 Comp. No. Specific Act. Metastin (1-54) 1 Metastin (45-54) 10  17 5  18 1  19 2  24 1  30 10  31 2  32 10  40 30  41 10  42 30  45 1  50 30  53 1  54 5  55 5  56 1  74 1  75 1  76 1  78 10  79 1  87 1  88 1  97 10  98 ½ 101 10 105 1 109 20 110 20 111 3 112 2 114 3 128 10 130 10 131 3 132 10 133 3 134 30 141 10 142 2 143 3 144 1 146 10 151 1 152 5 154 5 156 2 163 1 166 5 169 2 170 1 171 10 172 1 173 1

TABLE 20 174 10 176 5 182 5 187 1 189 10 190 10 192 1 193 ½ 194 1 197 10 198 10 199 3 200 10 201 1 203 10 204 5 205 10 206 10 207 ½ 208 1 209 ½ 210 1 211 10 212 10 213 2 214 10 215 10 216 1 217 20 220 5 222 10 224 2 225 1 226 1 227 1 228 5 229 1 230 10 231 1 232 3 233 1 234 1 235 1 236 2 237 3 238 1 241 1 242 2 244 1 245 1 246 2 247 1 248 2 249 1 250 1 254 1 255 1

TABLE 21 256 1 257 3 258 2 259 1 260 5 261 1 265 3 266 2 267 2 268 1 269 3 270 1 271 1 272 2 273 5 274 1 277 2 278 2 279 5 281 ½ 284 1 286 2 287 2 288 1 289 1 290 1 291 2 294 10  295 1 296 3 297 1 298 5 299 5 300 5 301 1 302 2 303 5 304 3 305 5 306 2 307 1 308 2 310 3 311 1 312 3 314 1 315 1 316 1 317 1 318 5 319 3 322 1 323 1 332 2 333 1 334 5 339 2

TABLE 22 340 ⅕ 341 2 344 ½ 345 2 346 2 347 ½ 348 ⅕ 349 ⅕ 351 ½ 352 ⅓ 353 10 354 10 358 2 362   1/10 364 1 366 ⅓ 367 ⅕ 368 ½ 369 2 373 2 374 ⅓ 375 2 378 ½ 379 2 380 5 385 10 386 7 387 1 392 ⅕ 393 1 397 5 400 1 408 ⅓ 412 ⅕ 417 1 421 ⅓ 423 5 428   1/10 431 1 432 2 434   1/10 435 10 436 5 437 2 438 3 439 2 440 1 441 1 442 ½ 443 ½ 444 ⅓ 445 5 446 1 447 5 448 3 449 5 450 ⅓

TABLE 23 451 5 452 1 453 1 454 6 455 5 459 2 460 ⅓ 461 ⅓ 462 1 463 2 464 1 466 ⅓ 467 1 468 1 471 1 472 3 473 3 474 5 475 3 477 ⅕ 478 ⅓ 479 5 480 1 481 5 486 ½ 487 1 488 1 489 ½ 490 3 491 7 492 5 493 2 494 ⅓ 495 ⅙ 496 5 497 2 498 7 499 10 500 1 501 10 502 10 503 10 504 2 505 20 506 1 507 5 508 10 509 20 510 3 511 10 512 30 513 20 514 10 515 10

TEST EXAMPLE 3

Assay for intracellular Ca ion level-increasing activity using FLIPR

The intracellular Ca ion level-increasing activity was measured using FLIPR as in TEST EXAMPLE 2. However, (1) the evaluation in TEST EXAMPLE 2 for measuring a change in intracellular Ca ion level for 180 seconds with passage of time was changed to the evaluation for 40 seconds after initiation of the reaction. Also, (2) indication of the activity is changed to EC₅₀/MS10 EC₅₀ from the specific activity to Metastin (1-54).

A part of the evaluation results are shown in TABLE 24.

TABLE 24 Comp. No. Specific Act. 40 1.6 41 2.7 42 1.6 82 1.0 97 2.9 109 2.6 114 4.1 128 0.5 134 0.5 141 1.6 146 1.5 152 1.4 156 0.9 174 2.3 176 1.3 187 1.9 206 4.8 208 7.3 210 9.3 211 1.3 212 1.1 217 3.1 222 2.7 232 3.9 239 6.7 240 4.9 241 5.3 242 1.4 260 4.3 265 4.4 266 5.4 268 4.5 269 3.4 279 6.4 294 0.7 296 5.2 297 5.5 298 1.8 303 6.9 305 2.0 308 2.6 310 2.0 311 6.2 312 4.0 314 4.4 318 2.9 319 3.1 322 5.4 332 4.9 333 5.0 334 1.4 339 5.9 341 2.8 353 0.8 354 0.8 358 5.6 369 4.8 375 5.2 378 10.4 379 3.0 385 0.7 386 2.9 387 5.0 393 5.9 423 5.6 436 1.4 438 3.0 445 4.2 447 1.4 449 4.2 451 2.6 454 2.5 455 4.1 459 7.3 463 4.6 464 10.5 467 4.0 468 5.2 472 3.4 473 4.2 474 3.2 475 4.2 479 2.6 480 8.3 481 2.4 488 5.5 490 6.2 491 1.0 492 1.1 493 2.2 494 8.6 496 0.7 497 1.4 498 1.5 499 1.4 500 3.2 501 1.1 502 1.4 503 0.4 504 6.9 505 0.7 506 1.3 507 1.7 508 1.0 509 2.0 510 3.5 511 0.5 512 0.8 513 0.4 514 0.7 515 1.0 516 3.7 517 1.0 518 10.5 519 2.4 521 2.4 522 1.9 523 1.1 524 1.1 527 3.3 528 1.4 529 1.8 530 3.4 531 1.8 532 1.0 533 9.7 534 5.6 535 0.8 536 1.8 537 4.7 538 3.3 539 1.2 540 0.7 541 2.0 542 1.4 545 1.1 546 1.9 547 2.5 548 1.7 550 0.7 551 1.2 552 2.3 553 1.9 554 1.3 555 1.5 556 2.8 557 3.2 558 0.4 559 0.3 561 1.6 562 1.0 563 0.7 564 0.5 565 0.6 566 0.8 567 0.8 568 0.6 569 0.5 570 0.5 571 1.2 572 0.7 573 0.7 576 0.8 577 0.7 578 0.8 579 0.6 580 0.6 584 0.4 585 0.4 586 0.3 589 2.3 590 1.4 591 1.2 592 1.1 594 2.1 595 11.4 597 0.6 598 0.3 599 0.5 600 0.3 601 3.1 602 2.4 603 1.7 604 6.3 605 3.9 607 2.2 608 2.2 609 0.9 610 1.9 611 1.7 612 0.8 613 0.4 614 0.8 615 0.7 616 1.1 617 2.4 618 1.6 619 1.5 620 1.7 621 1.9 622 2.8 623 0.6 624 1.2 625 2.8 626 2.1 627 1.6 628 4.4 629 3.4 630 4.2 631 2 632 1.1 633 3.4 634 10.5 635 1.4 637 0.8 638 1.7 639 2 641 3.5 642 3.7 643 2.5 644 2.5 645 1.1 646 1.8 647 10.6 648 1.6 649 1 650 0.6 651 0.7 652 0.9 653 1.3 654 2.9 655 4.7 656 2.9 657 1.1 658 0.4 659 0.6 660 1.1 661 8.5 662 0.7 663 0.8 664 0.6 665 1.1 666 1.1 667 1.4 668 1.2 669 0.5 670 0.9 671 3.6 672 2.1 674 2 675 0.8 676 1.4 677 0.3 678 1.1 679 1.8 680 2.5 681 1.2 682 7.3 685 4.8 686 0.6 688 9.7 689 2.3 691 1.1 692 0.7 693 1.5 694 1.7 695 0.7 696 0.5 698 2.2 699 1.3 700 0.8 701 1.4 702 0.6 703 3.7

TEST EXAMPLE 4 Assay for Cell Growth Inhibition Activity in hOT7T175-Expressed CHO Cells

hOT7T175-Expressed CHO cells (hereinafter hOT7T175) was cultured in DMEM supplemented with 10% dialyzed FBS (hereinafter 10% dFBS/DMEM), which was used for the following assay. hOT7T175 was suspended in 10% dFBS/DMEM at 10,000 cells/ml. The cells were plated on a 96 well plate at 100 μL each/well (1,000 cells/well), followed by culturing at 37° C. −5% CO₂ incubator overnight. On the following day, the medium was removed and 90 μL of 10% dFBS/DMEM supplemented with 0.5% BSA (hereinafter, 0.5% BSA/10% dFBS/DMEM) was added. Subsequently, 10 μL of a solution of metastin or metastin derivative in 0.5% BSA/10% dFBS/DMEM was added to each well, followed by culturing at 37° C. −5% CO₂ incubator for 3 days. After 10 μL of Cell Counting Kit-8 solution (Dojin Chemical Laboratory) was added to each well, incubation was performed at 37° C. −5% CO₂ incubator for 4 hours, absorbance was measured at 450 nm.

The cell inhibition activities of Metastin (1-54), Metastin (45-54) and synthetic compound are shown in TABLE 25.

TABLE 25 Compound Number IC50 (M) 305 8.94E−09 232 9.67E−09 286 1.83E−08 303 4.12E−08 322 7.19E−08 141 8.70E−08  1-54 2.12E−07 45-54 8.51E−06 *“1-54” and “45-54” represent Metastin (1-54) and Metastin (45-54), respectively.

TEST EXAMPLE 5 Assay for Chemotaxis Inhibition Activity in hOT7T175-Expressed CHO Cells

hOT7T175-Expressed CHO cells (hereinafter hOT7T175) was cultured in DMEM supplemented with 10% dialyzed FBS (hereinafter 10% dFBS/DMEM), which was provided for assay. Also a 24-well 6.5 mm Transwell (pore size 8.0 μm) (COSTAR) was treated with fibronectin by the following method. Specifically, 0.5 ml of 1 μg/ml bovine fibronectin (Yagai Co., Ltd.) was added to the upper and lower chambers of Transwell. After the mixture was settled at room temperature for 10 minutes, the fibronectin solution was removed and further air-dried. After hOT7T175 washed with DMEM 3 times, the cells were suspended in DMEM containing 0.5% BSA (hereinafter 0.5% BSA/DMEM) at a density of 2.5×10⁶ cells/ml. Metastin or a metastin derivative was diluted with 0.5% BSA/DMEM. After 600 μL of 0.5% BSA/DMEM supplemented with 20% FBS (or 0.5% BSA/DMEM for negative control) was added to the lower chamber of Transwell, and 50 μL of the cell suspension and 50 μL of the metastin or a metastin derivative dilution (or 0.5% BSA/DMEM for positive control) were added to the upper chamber. After incubation at 37° C. in a 5% CO₂ incubator for 7 hours, the culture medium was removed and the upper side of the filter was wiped with a cotton swap wetted with phosphate-buffered saline to remove all cells on the upper side of the filter. The filter was fixed and stained with DifQuick (International Reagents Corporation) and the cells migrated toward the lower side of the filter were counted. The chemotaxis inhibition activity is shown in FIG. 1.

TEST EXAMPLE 6 Evaluation of Tumor Growth Inhibition Activity

The tumor growth inhibition effect of Metastin (1-54) (hereinafter referred to as Metastin) and Compounds (Compound Nos. 305 and 322) in vivo using tumor-bearing mice with human colonic carcinoma-derived cell line SW620.

Alza osmotic pump (0.25 μL/hour, 14 days release, Model 1002) filled with 100 μL each of 1 mM Metastin, 0.1 mM and 1 mM Compounds dissolved in distilled water (Otsuka Joryusui K.K.) and distilled water as a vehicle was subcutaneously embedded into the back of BALB/cAnN-nu mice (6 weeks old, female, Charles River Japan, Inc.) under ether anesthesia to initiate intermittent administration for 14 days.

The number of experiments was n=10 in the Metastin group and the vehicle group and n=11 in the both Compound groups. On the following day, human colonic carcinoma-derived cell line SW620 (ATCC) was dissolved in 20 mM phosphate buffered saline (pH 7.2)(PBS) containing 200 μL of 0.15M NaCl at a density of 2×10⁶ cells. The resulting solution was subcutaneously injected into the left flank of the mice above. The day when the cells were injected was made Day 0. Tumor was measured with an electronic caliper every other or 2 other days during Days 4 to 13 from the cell administration, and tumor size was calculated by the equation: (shorter diameter)²×longer diameter/2. As shown in FIG. 2, the Metastin group (24 mol/day/mouse×14 days) showed a significant effect of tumor growth inhibition on Day 6, when compared to the vehicle group. On the other hand, the Compound No. 322 group showed a significant tumor growth inhibition activity in a 1/10 dose (2.4 mol/day/mouse×14 days) of Metastin from Days 6 to 8. Also, the Compound No. 322 group (24 mol/day/mouse×14 days) receiving the same dose as that of Metastin showed a significant tumor growth inhibition activity from Days 6 to 11, when compared to the vehicle group and on Day 11, showed a significant tumor growth inhibition activity even when compared with the Metastin group. The foregoing results reveal that Metastin shows the effect of tumor growth inhibition in vivo as well and Compound No. 322 has the effect of tumor growth inhibition of 10 times higher than with Metastin.

The results of Compound No. 305 are also shown in FIG. 3. The Metastin group (24 mol/day/mouse×14 days) showed a significant effect of tumor growth inhibition from Days 5 to 7, when compared to the vehicle group. On the other hand, the Compound No. 305 group (2.4 nmol/day/mouse×14 days) receiving a 1/10 dose as that of Metastin showed a significant tumor growth inhibition activity from Days 5 to 11, when compared to the vehicle group. Furthermore, the Compound No. 305 group (24 nmol/day/mouse×14 days) receiving the same dose as that of Metastin showed a significant effect of tumor growth inhibition from Days 5 to 9 and on Day 11, when compared to the vehicle group, revealing that Compound No. 305 also shows the in vivo effect of tumor growth inhibition of 10 times higher than with Metastin.

TEST EXAMPLE 7 Effect of Elevating Sugar Level by Metastin

In order to study the effect of metastin on sugar level by peripheral administration, an operation was performed in free moving animal to collect blood. Mature Wistar male rats (weighing 210-230 g at the time of operation) were anesthetized by intraperitoneal injection of 50 mg/kg pentobarbital. The animal was taped dorsally to the dissection pad and the left jugular vein was exposed. A polyethylene tube SP35 (inner diameter of 0.5 mm, outer diameter of 0.9 mm, Natsume Seisakusho Co., Ltd.) was cut into a length of about 30 cm and filled up with 200 units/ml of heparinated saline. Thereafter, the tube was inserted into the jugular vein to a depth of about 4.5 cm and fixed. The other end of the tube was subcutaneously inserted into the back to expose at the jugular (back).

After the operation, the animal was maintained overnight. Prior to administration of metastin, 300 μl of blood was drawn through a 1 ml tuberculin syringe and a 25-gauge needle (both by Terumo Co., Ltd.). To prevent blood clotting, 3 μl of 300 KIU/ml aprotinin solution containing 3 mg/ml EDTA had previously been filled in the syringe. Otsuka saline or 1 mL saline solution of metastin (17, 80 or 170 nmol) was intravenously injected in a dose of 1 mL/kg through the tube. Blood was collected from the jugular vein by 3001 each 0, 5, 15, 30 and 60 minutes starting from the intravenous injection. The collected blood was centrifuged (13,000 rpm, 5 minutes) with a high speed refrigerated centrifuge (MR-150, Tomy Seiko Co., Ltd.) to recover the supernatant (plasma). Glucose level in blood was measured using Fuji Drychem 3500 (FUJI FILM). As shown in FIG. 4, the Metastin group showed a significant effect (p<0.005, n=5) of enhancing glucose level in blood dose-dependently (17-170 nmol/kg) from 5 minutes after the intravenous injection, when compared to the control group. In the blood glucose level, a prolonged period of time (30 minutes at maximum) for enhancing the sugar level accompanied by an increase of the maximum level was noted metastin, as the dose increased.

TEST EXAMPLE 8 Effect of Promoting Pancreatic Glucagon Secretion by Metastin

In order to study the mechanism of metastin for the effect of enhancing glucose level in blood, effects of metastin on the level of blood glucagon, insulin, corticosterone and thyroid hormone (T3) known to be hormones affecting glucose level in blood were examined. An operation was performed in free moving mature Wistar male rats (weighing 260-300 g at the time of operation) to collect blood. After the operation, the animal was maintained overnight. Prior to administration of metastin, 300 μl of blood was drawn through a 1 ml tuberculin syringe and a 25-gauge needle (both by Terumo Co., Ltd.). To prevent blood clotting, 3 μl of 300 KIU/ml aprotinin solution containing 3 mg/ml EDTA had previously been filled in the syringe. Otsuka saline or a saline solution of metastin (80 nmol/mL) was intravenously injected in a dose of 1 mL/kg through the tube. Blood was collected from the jugular vein by 300 μl each 1, 3, 5 and 15 minutes starting from the intravenous injection. The collected blood was centrifuged (13,000 rpm, 5 minutes) with a high speed refrigerated centrifuge (MR-150, Tomy Seiko Co., Ltd.) to recover the supernatant (plasma). Glucagon level in blood was measured using a glucagon kit “Daiichi” (Daiichi Radioisotope Laboratories Ltd.), insulin level in blood using rat insulin [¹²⁵I] assay system (Amersham Biosciences), corticosterone level in blood using rat corticosterone [¹²⁵I] assay system (Amersham Biosciences), thyroid hormone (T3) in blood using T-3.RIA beads (Dinabott Co. Ltd.), and glucose level in blood using Fuji Drychem 3500 (FUJI FILM). As shown in FIG. 5, the Metastin group showed a significant effect of enhancing glucagon level in blood 1 minute after the injection, when compared to the control group. The significant effect of enhancing glucagon level continued until 5 minutes after the injection. On the other hand, in the insulin level in blood (FIG. 6), corticosterone level in blood (FIG. 7) and thyroid hormone (T3) level in blood (FIG. 8), no change was noted by the injection of metastin. Based on these results and the observed increase in blood glucagon level followed by blood glucose level (FIG. 9), it was considered that the effect of blood glucose level by intravenous injection of metastin would be induced due to stimulation of glucagon secretion by metastin.

TEST EXAMPLE 9 Effect of Elevating Sugar Level by Metastin Derivatives

The effect of metastin derivatives KiSS305 (Compound No. 305) and KiSS322 (Compound No. 322) on blood glucose level and blood glucagon level was examined. An operation was performed in free moving mature Wistar male rats (weighing 260-3000 g at the time of operation) in a manner similar to TEST EXAMPLE 1 to collect blood. After the operation, the animal was maintained overnight. Prior to administration of metastin, 300 μl of blood was drawn through a 1 ml tuberculin syringe and a 25-gauge needle (both by Terumo Co., Ltd.). To prevent blood clotting, 3 μl of 300 KIU/ml aprotinin solution containing 3 mg/ml EDTA had previously been filled in the syringe. Otsuka saline or a saline solution of metastin (80 nmol/mL) was intravenously injected in a dose of 1 mL/kg through the tube. Blood was collected from the jugular vein by 300 μl each 2, 5, 15, 30, 45 and 60 minutes starting from the intravenous injection. The collected blood was centrifuged (13,000 rpm, 5 minutes) with a high speed refrigerated centrifuge (MR-150, Tomy Seiko Co, Ltd.) to recover the supernatant (plasma). Glucose level in blood was measured using Fuji Drychem 3500 (FUJI FILM) and glucagon level in blood was measured using a glucagon kit “Daiichi” (Daiichi Radioisotope Laboratories Ltd.), as in TEST EXAMPLE 1 or 2. As shown in FIG. 10, both compounds showed an increase in the blood glucose level. Also, both compounds showed an increase in the blood glucagon level, as shown in FIG. 11.

TEST EXAMPLE 10 Induction of Ovulation by Human Metastin in Immature Rat

Equine chorionic gonadotropin (eCG, serotropin, Dainippon Pharmaceutical Co., Ltd.) was dissolved in saline (Otsuka Pharmaceutical Co., Ltd.) in a concentration of 100 IU/mL. Using a 1 ml tuberculin syringe and a 26-gauge needle (both by Terumo Co., Ltd.), eCG was subcutaneously injected into the dorsal area of female Wistar rats of 23 days old after birth (Charles River Japan, Inc.) in a dose of 10 IU/animal, during 9:30 to 10:00 AM. Following the eCG injection, the animal was grouped after 47 to 48 hours as shown below, to which groups, each drug was injected.

Group A (5 rats): Human chorionic gonadotropin (hCG, gonadotropin, Dainippon Pharmaceutical Co., Ltd.) was dissolved in saline at 100 IU/mL and the solution was subcutaneously injected into the back in a dose of 20 IU/animal.

Group B (5 rats): Human metastin was dissolved in saline at 100 nmol/mL and the solution was subcutaneously injected into the back in a dose of 20 nmol/animal.

Group C (5 rats): Human metastin was dissolved in saline at 33.3 nmol/mL and the solution was subcutaneously injected into the back in a dose of 6.67 mmol/animal.

Group D (6 rats): Saline was subcutaneously injected into the back in a dose of 200 μL/animal.

After administration of the drugs described above, the animal was sacrificed by decapitation after 24 to 25 hours to recover blood, bilateral oviducts and uterus. In collecting blood, 90 μl of 10 KIU/ml aprotinin solution (Trasylol, Bayer) containing 3 mg/ml EDTA had been previously filled in a tube for recovery to prevent blood clotting. After blood recovery, the blood was thoroughly blended and the mixture was centrifuged at 2,000 G for 25 minutes. After the supernatant was recovered, the product was used as a plasma sample.

The number of oocytes was counted as follows.

Where retention of oocytes in the oviducal ampulla was confirmed by stereomicroscopic observation of the oviduct, the ampulla was punctured with a syringe with 27-gauge needle for syringe (Terumo) to retrieve the oocytes. After granulosa cells surrounding the oocytes were removed by trypsin treatment, the number of oocytes was counted. Where retention of oocytes in the oviducal ampulla was not confirmed by stereomicroscopic observation of the oviduct, a 27-gauge needle with the polished tip for syringe was inserted into the tubal ostium and more than 400 μL of saline was flushed into the oviduct and uterine for rinsing. Then, the presence or absence of oocytes in the effluent was observed.

The number of oocytes obtained is shown in TABLE 26.

TABLE 26 Group A Group B Group C Group D 1 36 29 29 0 2 35 56 39 0 3 40 17 32 0 4 42 25 22 0 5 35 32 16 0 Average 37.6 31.8 27.6 0.00 of Ovulation Standard 3.21 14.65 8.91 0.00 Deviation In the table, the numbers “1” through “5”represent a number for individual rat.

In Group A, which is a multipurpose superovulation treatment group, ovulation of 37.6 oocytes in average per rat was confirmed. In Groups B and C receiving metastin, ovulation of 31.8 and 27.6 oocytes in average, respectively, were confirmed. Turning to Group D receiving saline, the number of oocytes was 0.6 in average, indicating that voluntary ovulation was little observed in the absence of ovulation stimulation.

The level of estradiol contained in the plasma collected from the rats shown in TABLE 22 was determined by radioimmunoassay (DPC-Estradiol Kit; Diagnostic Products Corporation). The results are shown in FIG. 12.

The results reveal that among Groups A, B and C, there is no difference in the level of estradiol contained in plasma, showing that the level of estradiol was extremely high only in Group D receiving saline.

The level of progesterone contained in plasma was determined by radioimmunoassay (DPC.Progesterone; Diagnostic Products Corporation). The results are shown in FIG. 13.

The results reveal that the level of progesterone was highest in Group A and in Groups B and C, the blood level was approximately half that of Group A and that the progesterone level was extremely low in Group D.

In general, the major steroid hormone produced in rat mouse and human ovaries is estrogen in the mature phase of ovarian follicle, whereas it is progesterone after ovulation was induced. It is understood actually from the results in FIG. 12 and FIG. 13 that Group D receiving saline maintained the state where estrogen was highly produced, because of no induction of ovulation; whereas in Group A receiving hCG, production of estrogen increased. In Groups B and C, which are groups receiving Metastin, the plasma estrogen level was very low but the level of progesterone increased, indicating that metastin induced ovulation in the rat ovary via its normal ovulatory process. It is also considered that since the progesterone level in Groups B and C was lower than in Group A, metastin would have a milder ovarian stimulation.

TEST EXAMPLE 11 Gonadotropin-Releasing Effect of Human Metastin in Immature Rat

Human metastin dissolved in saline in a concentration of 33.3 nmol/mL was subcutaneously injected into the dorsal area of female Wistar rats of 25 days old after birth (Charles River Japan, Inc.) in a dose of 200 μL/animal, i.e., 6.67 mmol as human metastin, during 9:00 to 10:00 AM. Prior to the metastin injection and 1, 2 and 4 hours after the injection, the animal was decapitated to recover blood. In recovery of blood, 90 μl of 10 KIU/ml aprotinin solution (Trasylol, Bayer) containing 3 mg/ml EDTA had been previously filled in a centrifuging tube for recovery to prevent blood clotting. After blood recovery, the blood was thoroughly blended and the mixture was centrifuged at 2,000 G for 25 minutes. After the supernatant was recovered, the product was used as a plasma sample. The levels of FSH (follicle-stimulating hormone), LH (luteinizing hormone) and progesterone contained in the plasma were determined by radioimmunoassay (Rat Follicle Stimulating Hormone (rFSH) [125I] Biotrack Assay System with Magnetic Separation, Rat Luteinizing Hormone (rLH) [¹²⁵I] Biotrack Assay System with Magnetic Separation, both by Amersham Bioscience, and DPC.Progesterone by Diagnostic Products Corporation).

The results obtained by monitoring changes in the FSH level in blood from the immature rat by the metastin injection are shown in FIG. 14. One hour after the metastin injection, the blood FSH level began to significantly increase and reached the maximum after 2 hours. While a decrease in the blood FSH level was noted after 4 hours, the FSH level was still maintained higher than the level prior to the injection.

The results obtained by monitoring changes in the LH level in blood from the immature rat by the metastin injection are shown in FIG. 15. Similarly to the case of FSH, the blood LH level began to significantly increase 1 hour after and reached the maximum after 2 hours. While a decrease in the blood LH level was noted after 4 hours, the LH level was still maintained higher than the level prior to the injection.

The results obtained by monitoring changes in the progesterone level in blood from the immature rat by the metastin injection are shown in FIG. 16. Reflecting the increase of blood LH level, the progesterone level began to increase slowly 1 hour after the metastin injection and showed a significantly higher level than the level prior to the injection.

The results of FIG. 14 and FIG. 15 reveal that peripheral administration of metastin induces release of gonadotropin such as FSH, LH, etc. The induction of ovulation by metastin demonstrated in TEST EXAMPLE 9 is considered to be mediated by this gonadotropin release, particularly LH release.

The effect of inducing ovulation demonstrated in TEST EXAMPLE 9 is an action in rats receiving eCG but the effect in this TEST EXAMPLE shows the results obtained using nude rats. No eCG pretreatment is required for the effect of releasing gonadotropin by metastin.

The results shown in FIG. 16 mean that the release of gonadotropin by the metastin injection imparts physiological stimulation also to the ovary, resulting in increasing the production of progesterone.

TEST EXAMPLE 12 Gonadotropin-Releasing Effect of Human Metastin in Mature Male Rat

Human metastin dissolved in saline in a concentration of 175 nmol/mL was subcutaneously injected into the dorsal area of male Wistar rats of 11 weeks old after birth (Charles River Japan, Inc.) in a dose of 200 μL/animal, i.e., 35 mmol as human metastin, during 10:30 to 11:30 AM. Prior to the metastin injection and 1, 2 and 4 hours after the injection, the animal was decapitated to recover blood. In recovery of blood, 300 μl of 10 KIU/ml aprotinin solution (Trasylol, Bayer) containing 3 mg/ml EDTA had been previously filled in a centrifuging tube for recovery to prevent blood clotting. After blood recovery, the blood was thoroughly blended and the mixture was centrifuged at 2,000 G for 25 minutes. After the supernatant was recovered, the product was used as a plasma sample. The levels of FSH (follicle-stimulating hormone), LH (luteinizing hormone) and testosterone contained in the plasma were determined by radioimmunoassay (Rat Follicle Stimulating Hormone (rFSH) [¹²⁵I] Biotrack Assay System with Magnetic Separation, Rat Luteinizing Hormone (rLH) [¹²⁵I] Biotrack Assay System with Magnetic Separation, both by Amersham Bioscience, and DPC.Total Testosterone by Diagnostic Products Corporation).

The results obtained by monitoring changes in the blood FSH level in rat by the metastin injection are shown in FIG. 17. One hour after the metastin injection, the blood FSH level began to significantly increase and reached the maximum after 2 hours, and even after 4 hours, still maintained a higher state.

The results obtained by monitoring changes in the blood LH level in rat by the metastin injection are shown in FIG. 18. Similarly to the case of FSH, the blood LH level began to significantly increase 1 hour after and reached the maximum after 2 hours. While a decrease in the blood LH level was noted after 4 hours, the LH level was still maintained higher than the level prior to the injection.

The results obtained by monitoring changes in the blood testosterone level in rat by the metastin injection are shown in FIG. 19. The testosterone level showed a rapid increase in 1 hour after the metastin injection. While a decrease in the blood testosterone level was noted after 2 and 4 hours, the testosterone level was still maintained at both points of time higher than the level prior to the injection.

The results of FIG. 17 and FIG. 18 reveal that peripheral administration of metastin induces release of gonadotropin such as FSH, LH, etc. in male rat. In view of the results of TEST EXAMPLE 10, metastin is considered to be an extremely important factor in both female and male rats, in stimulating the release of gonadotropin.

The results shown in FIG. 19 mean that the release of gonadotropin by the metastin injection imparts physiological stimulation also to the testis, resulting in increasing the production of testosterone.

From these results it is considered that administration of metastin would stimulate the testis mediated by release of gonadotropin. This suggests that metastin possibly affects the male reproductive function including seminal maturation, hormone secretion, etc.

TEST EXAMPLE 13 Test on Stability of Compound in Blood

Blood was drawn from Balb/c mouse of 8 weeks old (female), settled at 37° C. for 30 minutes and centrifuged at 13000 rpm for 10 minutes to give mouse serum. The serum thus obtained was frozen-stored at −80° C.

The stability test was performed by addition of 5 nmol of Compound (5 μL of aqueous solution) to 45 μL of serum and then settlement of the mixture at 37° C. The settlement was made at 3 points of time, including 2, 10 and 30 minutes. The sample after the settlement was boiled for 3 minutes and cooled on an ice bath. After 200 μL of acetonitrile/water (3/1) was added to the sample, the mixture was ultrasonicated for 5 minutes and then centrifuged at 5000 rpm for 1 minute. After 150 μL of the supernatant was diluted with 250 μL of distilled water, insoluble matters were removed by filtration through a filter having a pore size of 0.45 g/m and 200 μL of the filtrate was applied on HPLC (220 nm) to determine the peak area of Compound. A ratio of the peak area to the area when Compound was treated for 0 minute under the same conditions was calculated as a mean value in 4 respective runs to determine the residual ratio. Next, by taking the calculated residual ratio on the ordinate and time on the abscissa, a graph was prepared and approximated by an exponential function. Thus, the time when the residual ratio reached 50% was calculated as a half life.

The LC-VP series manufactured by Shimadzu Corporation was used as preparative HPLC and Wakosil-115C18 HG (4.6 mm×100 mm) manufactured by Wako Pure Chemical Industries, Ltd. was used as a column. Eluant A (0.1% TFA-containing water) and eluant B (0.1% TFA-containing acetonitrile) were used as eluants. Linear density gradient elution was performed at a flow rate of 1.0 ml/min. using eluants A/B: 100/0-0/50 (25 minutes).

Compounds tested and the t_(1/2) (min) values are shown in TABLE 27.

TABLE 27 Compound Number t_(1/2) (min) 1 22.5 3 0.6 42 0.7 82 1.8 134 2.4 141 8.7 232 28.2 286 57.5 296 47.2 305 66.6 308 13.2 319 33.0 322 94.2

TEST EXAMPLE 14 Induction of Ovulation in Immature Rat Using Metastin Derivatives

Equine chorionic gonadotropin (eCG, serotropin, Dainippon Pharmaceutical Co., Ltd.) was dissolved in saline (Otsuka Pharmaceutical Co., Ltd.) in a concentration of 100 IU/mL. Using a 1 ml tuberculin syringe and a 26-gauge needle (both by Terumo Co., Ltd.), eCG was subcutaneously injected into the dorsal area of female Wistar rats of 23 days old after birth (Charles River Japan, Inc.) in a dose of 10 IU/animal, during 9:00 to 10:00 AM. Following the eCG injection, the animal was grouped after 47 to 48 hours as shown below, to which groups, each drug was injected.

Group A (5 rats): Human chorionic gonadotropin (hCG, gonadotropin, Dainippon Pharmaceutical Co., Ltd.) was dissolved in saline at 100 IU/mL and the solution was subcutaneously injected into the back in a dose of 20 IU/animal.

Group B (5 rats): Compound No. 305 was dissolved in saline at 33.3 nmol/mL and the solution was subcutaneously injected into the back in a dose of 6.7 nmol/animal.

Group C (5 rats): Compound No. 305 was dissolved in saline at 10.0 mmol/mL and the solution was subcutaneously injected into the back in a dose of 2.0 nmol/animal.

Group D (5 rats): Compound No. 322 was dissolved in saline at 33.3 nmol/mL and the solution was subcutaneously injected into the back in a dose of 6.7 nmol/animal.

Group E (5 rats): Compound No. 322 was dissolved in saline at 10.0 nmol/mL and the solution was subcutaneously injected into the back in a dose of 2.0 nmol/animal.

Group F (6 rats): Saline was subcutaneously injected into the back in a dose of 200 μL/animal.

After administration of these drugs, the animal was sacrificed by decapitation after 24 to 25 hours to recover blood, bilateral oviducts and uterus. In collecting blood, 90 μl of 10 KIU/mL aprotinin solution (Trasylol, Bayer) containing 3 mg/ml EDTA had been previously filled in a tube for recovery to prevent blood clotting. After blood recovery, the blood was thoroughly blended and the mixture was centrifuged at 2,000 G for 25 minutes. After the supernatant was recovered, the product was used as a plasma sample.

The number of oocytes was counted by referring to the method described in Eur. J. Endocrinol., 138, 594-600 (1998).

Where retention of oocytes in the oviducal ampulla was confirmed by stereomicroscopic observation of the oviduct, the ampulla was punctured with a 27-gauge needle for syringe (Terumo) to retrieve the oocytes. After granulosa cells surrounding the oocytes were removed by trypsin treatment, the number of oocytes was counted. Where retention of oocytes in the oviducal ampulla was not confirmed by stereomicroscopic observation of the oviduct, a with 27-gauge needle with the polished tip for syringe was inserted into the tubal ostium and more than 400 μL of saline was flushed into the oviduct and uterine for rinsing. Then, the presence or absence of oocytes in the effluent was observed.

The number of oocytes thus obtained is shown in FIG. 20. In Group A, which is a multipurpose superovulation treatment group, the number of oocytes was 38.0 oocytes in average per rat. In Groups B, C and D, the number of oocytes was 32.6, 29.4 and 29.6 oocytes in average, respectively, indicating that ovulation was substantially equivalent to Group A. Turning to Group E receiving 2.0 mmol of Compound No. 322, 3 out of 5 rats were ovulated and the number of oocytes was 11.6 in average, which was less than Group A. Further in Group A for negative control, no ovulation was observed.

The results of FIG. 20 reveal that for induction of ovulation equivalent to hCG, at least 2.0 mmol/animal of Compound No. 305 and at least 6.7 mmol/animal of Compound No. 322 should be administered.

The results obtained by measuring the level of estradiol contained in plasma are shown in FIG. 21. The blood estradiol level was measured by radioimmunoassay (DPC.Estradiol Kit, Iatron, Inc.). As shown in FIG. 21, no difference was found among Groups A, B, C and D in terms of estradiol and only Group F showed a high level. Group E had a tendency to show a higher level in rats with no ovulation induction.

The results obtained by measuring the level of progesterone contained in plasma are shown in FIG. 22. The blood progesterone level was measured by radioimmunoassay (DPC.Progesterone, Iatron, Inc.). As shown in FIG. 22, the blood progesterone level was highest in Group A and in Groups B, C and D, the progesterone level shows less than a half of the level in Group A. Groups E and F shows a very low level.

The results of FIG. 21 and FIG. 22 reveal that more than 2.0 nmol/animal of Compound No. 305 and more than 6.7 mmol/animal of Compound No. 322 were administered to induce normal differentiation from estrogen-producing granulosa cells to progesterone-producing luteal cells. Furthermore, when Compound No. 305 or KiSS-322 was administered, the progesterone level was lower than in the hCG administration, suggesting that the stimulating effect of these derivatives on ovary would be milder than that of hCG.

TEST EXAMPLE 15 Evaluation of Blood Testosterone Level Decreasing Effect of Metastin Peptide Derivatives Using Mature Male Rat

A metastin peptide derivative (hereinafter peptide) was dissolved in distilled water (Otsuka Joryusui K.K.) to prepare 2 mM peptide solution. This peptide solution was filled in 5 ALZET osmotic pumps (Model 2001, 0.2 ml in volume, release rate: 0.001 ml/hr, DURECT Corporation). The ALZET pumps filled with the peptide solution were implanted subcutaneously in 5 CD(SD)IGS male rats of 9 weeks old after birth (Charles River Japan, Inc.) on the back under ether anesthesia by one pump for one animal. For negative control, distilled water (Otsuka Pharmaceutical Co., Ltd.) was filled in 5 ALZET osmotic pumps, which were similarly implanted in 5 male CD(SD)IGS rats (Charles River Japan, Inc.), respectively. These pump-implanted rats were fed for 6 days under normal feeding conditions. After weighing, the animal was decapitated to collect blood. After 0.03 ml/ml blood of aprotinin solution (Trasylol, Bayer) containing 0.1 mg/ml EDTA.2Na was added to blood, the mixture was centrifuged at 1,800 G for 25 minutes to isolate/recover plasma. From the plasma obtained, 0.05 ml was applied to radioimmunoassay (DPC.Total Testosterone Kit, Diagnostic Products Corporation) to measure the plasma testosterone level of each rat. The value below the limit of measurement (0.04 ng/ml of plasma level) in radioimmunoassay was treated as 0. A mean value of the testosterone levels from 5 rats receiving the peptide was calculated and a relative value (percent) of the mean value to a mean value from 5 rats receiving distilled water.

Using this evaluation method, various peptides were evaluated and a part of the results are shown in TABLES 28 and 29.

TABLE 28 Teststerone level Comp. No. in Blood 334 40% 354 43% 436 35% 269 7% 386 23% 499 2% 305 2% 385 2% 492 65% 496 3% 134 50% 141 31% 176 12%

TABLE 29 Comp. No. Teststerone level in Blood 505 40% 508 9% 509 2% 512 2% 515 2% 517 79%

TEST EXAMPLE 16

In a manner similar to TEST EXAMPLE 14, evaluation was made using 0.1 mM peptide solution and a part of the results obtained are shown in TABLE 30.

TABLE 30 Compond Teststerone level Number in Blood 305 48% 385 33% 499 32% 512 38% 516 3% 523 72% 538 45% 540 55% 545 37% 547 65% 550 2% 551 8% 552 21% 553 39% 554 52% 555 73% 558 2% 559 17% 562 11% 564 66% 565 80% 566 89% 567 86% 571 17%

TEST EXAMPLE 17 Evaluation of Metastin Peptide Derivatives for Action of Reducing Testosterone Level in Blood Using Mature Male Rat

Peptide solutions at the concentration of 1 mM was prepared by dissolving the metastin peptide derivatives (hereinafter referred to as peptide) in 50% DMSO aqueous solution. The peptide was encapsulated in five ALZET osmotic pump (Model 2001, 0.2 ml of volume, releasing rate 0.001 ml/hr, DURECT Corporation). The ALZET pumps encapsulated with the peptide solution were implanted to dorsal subcutaneous of five male CD (SD) IGS rat at nine weeks age (Charles River Japan, Inc.) anesthesized with ether for one pump to one rat. Separately, for negative controls, the ALZET osmotic pumps encapsulated with distilled water were implanted to five male CD (SD) IGS rat (Charles River Japan, Inc.) The rats were bred for six days under the normal conditions. After weighing, blood was collected by decapitation. To 1 ml of blood, 0.03 ml of aprotinin (Trasylol, Byer) solution containing 0.1 g/ml EDTA 2Na was added. The plasma was isolated by centrifugation at 1,800×g for 25 minutes and collected. The thus obtained plasma, 0.05 ml was effected by radioimmunoassay. (DPC Total Testosterone Kit, Diagnostic Products Corporation) to measure testosterone level in blood of each rat. The value beneath measuring limit of radioimmunoassay (0.04 ng/ml as concentration of plasma) was treated as zero. The mean values for testosterone level of five rats, to which the peptide was given, was calculated and the relative value (percentage) for the mean values of testosterone level of five rats, to which distilled watrer was given, was estimated. One example of the results evaluated for various peptides using this evaluation method was shown in TABLE 31.

TABLE 31 Comp. No. Testosterone level in Blood 305 2% 501 2% 545 2% 548 18% 555 2% 564 2% 589 2% 590 2% 591 2% 592 2% 595 3% 598 2% 599 2% 600 2% 602 2% 608 2% 612 2% 613 2% 615 2% 616 2% 617 2% 618 2% 621 2% 623 2% 625 2% 626 2% 627 2% 629 2% 630 2% 635 2% 637 2% 638 2% 642 2% 648 2% 649 2% 650 2% 651 2% 652 2% 657 2% 658 2% 660 2% 662 2% 663 2% 664 6% 666 2% 667 2% 670 2% 671 2% 672 2% 674 2% 675 2% 676 2% 677 2%

[Sequence Listing Free Text]

SEQ ID NO: 15 The C terminus is amidated.

SEQ ID NO: 16 The C terminus is amidated.

SEQ ID NO: 17 The C terminus is amidated.

SEQ ID NO: 18 The C terminus is amidated. 

1. A metastin derivative (II) represented by formula:

[wherein; V represents a group represented by formula:

or a group represented by formula:

n represents 0 or 1; W¹ represents N, CH or O (provided that when W¹ is N or CH, n represents 1 and when W¹ is O, n represents 0); W² represents N or CH; Z¹, Z³, Z⁵ and Z⁷ each represents hydrogen atom or a C₁₋₃ alkyl group; Z⁴, Z⁶ and Z⁸ each represents hydrogen atom, O or S; R² represents (1) hydrogen atom or (2) a cyclic or linear C₁₋₁₀ alkyl group, (3) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (4) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group; R³ represents (1) a C₁₋₈ alkyl group having an optionally substituted basic group and optionally having an additional substituent, (2) an aralkyl group having an optionally substituted basic group and optionally having an additional substituent, (3) a C₁₋₄ alkyl group having a non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent, or (4) a C₁₋₄ alkyl group having a non-aromatic heterocyclic group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent; R⁴ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; Q¹ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; Q² represents (1) CH₂, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, (2) NH, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, or (3) O; Y represents a group represented by formula: —CONH—, —CSNH—, —CH₂NH—, —NHCO—, —CH₂O—, —CH₂S—, —COO—, —CSO—, —CH₂CH₂—, or —CH═CH—, which may optionally be substituted with a C₁₋₆ alkyl group; and, Z⁹ represents hydrogen atom, O or S; and, P and P′, which may be the same or different, each may form a ring by combining P and P′ or P and Q¹ together and represents: (1) hydrogen atom; (2) an optional amino acid residue continuously or discontinuously bound from the C terminus of the 1-48 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1; (3) a group represented by formula: J¹-J²-C(J³)(Q³)Y¹C(J⁴)(Q⁴)Y²C(J¹)(Q¹)Y³C(J⁶)(Q⁶)C(=Z¹⁰) (wherein: J¹ represents (a) hydrogen atom or (b) (i) a C₁₋₁₅ acyl group, (ii) a C₁₋₁₅ alkyl group, (iii) a C₆₋₁₄ aryl group, (iv) carbamoyl group, (v) carboxyl group, (vi) sulfino group, (vii) amidino group, (viii) glyoxyloyl group or (ix) amino group, which groups may optionally be substituted with a substituent containing an optionally substituted cyclic group; J² represents (1) NH optionally substituted with a C₁₋₆ alkyl group, (2) CH₂ optionally substituted with a C₁₋₆ alkyl group, (3) 0 or (4) S; J³ through J⁶ each represents hydrogen atom or a C₁₋₃ alkyl group; Q³ through Q⁶ each represents a C₁₋₄ alkyl group, which may optionally have a substituent selected from the group consisting of: (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7, (7) an optionally substituted amino group, (8) an optionally substituted guanidino group, (9) an optionally substituted hydroxyl group, (10) an optionally substituted carboxyl group, (11) an optionally substituted carbamoyl group, and (12) an optionally substituted sulfhydryl group, or hydrogen atom; J³ and Q³, J⁴ and Q⁴, J⁵ and Q⁵ or J⁶ and Q⁶ may be combined together, or, J² and Q³, Y¹ and Q⁴, Y² and Q⁵, or Y³ and, Q⁶ may be combined together, to form a ring; Y¹ through Y³ each represents a group represented by formula: —CON(J¹³)-, —CSN(J¹³)-, —C(J¹⁴)N(J¹³)- or —N(J¹³)CO— (wherein J¹³ and J¹⁴ each represents hydrogen atom or a C₁₋₃ alkyl group); and, Z¹⁰ represents hydrogen atom, O or S); (4) a group represented by formula: J¹-J²-C(J⁷)(Q⁷)Y²C(J⁸)(Q⁸)Y³C(J⁹)(Q⁹)C(=Z¹⁰)- (wherein: J¹ and J², each has the same significance as described above; J⁷ through J⁹ have the same significance as for J³; Q⁷ through Q⁹ have the same significance as for Q³; Y² and Y³ each has the same significance as described above; Z¹⁰ has the same significance as described above; J⁷ and Q⁷, J⁸ and Q⁸ or J⁹ and Q⁹ may be combined together, or, J² and Q⁷, Y² and Q⁸ or Y³ and Q⁹ may be combined together, to form a ring); (5) a group represented by formula: J¹-J²-C(J¹⁰)(Q¹⁰)Y³C(J¹¹)(Q¹¹)C(=Z¹⁰)- (wherein: ‘J¹ and J² have the same significance as described above represents; J¹⁰ and J¹¹ have the same significance as for J³; Q¹⁰ and Q¹¹ have the same significance as for Q³; Y³ has the same significance as described above; Z¹⁰ has the same significance as described above; and, J¹⁰ and Q¹⁰ or J¹¹ and Q¹¹ may be combined together, or J² and Q¹⁰ or Y³ and Q¹¹ may be combined together, to form a ring); (6) a group represented by formula: J¹-J²-C(J¹²)(Q¹²)C(=Z¹⁰)- (wherein; J¹ and J² have the same significance as described above; J¹² has the same significance as for J³; Q¹² has the same significance as for Q³; Z¹⁰ has the same significance as described above; and, J¹² and Q¹² may be combined together, or J² and Q¹² may be combined together, to form a ring); or, (7) a group represented by formula: J¹- (wherein: J¹ has the same significance as described above)] (provided that a peptide consisting of the amino acid sequence of 1-54, 2-54, 3-54, 4-54, 5-54, 6-54, 7-54, 8-54, 9-54, 10-54, 11-54, 12-54, 13-54, 14-54, 15-54, 16-54, 17-54, 18-54, 19-54, 20-54, 21-54, 22-54, 23-54, 24-54, 25-54, 26-54, 27-54, 28-54, 29-54, 30-54, 31-54, 32-54, 33-54, 34-54, 35-54, 36-54, 37-54, 38-54, 39-54, 40-54, 41-54, 42-54, 43-54, 44-54, 45-54, 46-54, 47-54, 48-54 or 49-54 in the amino acid sequence represented by SEQ ID NO: 1 is excluded), or a salt thereof.
 2. The metastin derivative (II) according to claim 1, wherein V is a group represented by formula:

(wherein each symbol has the same significance as defined in claim 1), or a salt thereof.
 3. The metastin derivative (II) according to claim 1, wherein V is a group represented by formula:

(wherein each symbol has the same significance as defined in claim 1), or a salt thereof.
 4. A prodrug of the metastin derivative (II) according to claim 1 or a salt thereof.
 5. A pharmaceutical comprising the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 6. The pharmaceutical according to claim 5, which is an agent for suppressing cancer metastasis or an agent for suppressing cancer growth.
 7. The pharmaceutical according to claim 5, which is an agent for preventing or treating cancer.
 8. The pharmaceutical according to claim 5, which is an agent for controlling placental function.
 9. The pharmaceutical according to claim 5, which is an agent for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery.
 10. The pharmaceutical according to claim 5, which is an agent for improving gonadal function.
 11. The pharmaceutical according to claim 5, which is an agent for preventing or treating hormone-dependent cancer, infertility, endometriosis, early puberty or myoma of the uterus.
 12. The pharmaceutical according to claim 5, which is an agent for inducing or stimulating ovulation.
 13. The pharmaceutical according to claim 5, which is a gonadotropic hormone secretagogue agent or a sex hormone secretagogue agent.
 14. The pharmaceutical according to claim 5, which is an agent for preventing or treating Alzheimer's disease or moderate cognitive impairment.
 15. A method for suppressing cancer metastasis or cancer growth, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 16. A method for preventing or treating cancer, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 17. A method for controlling placental function, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 18. A method for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 19. A method for improving gonadal function, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 20. A method for preventing or treating hormone-dependent cancer, infertility, endometriosis, early puberty or myoma of the uterus, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 21. A method for inducing or stimulating ovulation, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 22. A method for promoting gonadotropic hormone secretion or promoting sex hormone secretion, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 23. A method for preventing or treating Alzheimer's disease or moderate cognitive impairment, which comprises administering to a mammal an effective dose of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof.
 24. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for suppressing cancer metastasis or an agent for suppressing cancer growth.
 25. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating cancer.
 26. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for controlling placental function.
 27. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating choriocarcinoma, hydatid mole, invasive mole, miscarriage, fetal hypoplasia, abnormal glucose metabolism, abnormal lipid metabolism or induction of delivery.
 28. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for improving gonadal function.
 29. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating hormone-dependent cancer, infertility, endometriosis, early puberty or myoma of the uterus.
 30. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for inducing or stimulating ovulation.
 31. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture a gonadotropic hormone secretagogue agent or a sex hormone secretagogue agent.
 32. Use of the metastin derivative (II) according to claim 1 or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating Alzheimer's disease or moderate cognitive impairment.
 33. An agent for suppressing gonadotropic hormone secretion or an agent for suppressing sex hormone secretion comprising the metastin derivative (III) represented by

formula: [wherein: V′ represents a group represented by formula:

a group represented by formula:

or a group represented by formula:

n represents 0 or 1; W¹ represents N, CH or O (provided that W¹ is N or CH, n represents 1, and when W¹ is O, n represents 0); W² represents N or CH; Z¹, Z³, Z⁵ and Z⁷ each represents hydrogen atom or a C₁₋₃ alkyl group; Z², Z⁴, Z⁶ and Z⁸ each represents hydrogen atom, O or S; R¹ represents (1) hydrogen atom, (2) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group, (3) a cyclic or linear C₁₋₁₀ alkyl group or (4) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (5) an optionally substituted aromatic cyclic group; R¹ represents (1) hydrogen atom or (2) a cyclic or linear C₁₋₁₀ alkyl group, (3) a C₁₋₁₀ alkyl group consisting of a cyclic alkyl group and a linear alkyl group, or (4) a C₁₋₈ alkyl group optionally substituted with a substituent selected from the group consisting of an optionally substituted carbamoyl group, an optionally substituted hydroxyl group and an optionally substituted aromatic cyclic group; R³ represents (1) a C₁₋₈ alkyl group having an optionally substituted basic group and optionally having an additional substituent, (2) an aralkyl group having an optionally substituted basic group and optionally having an additional substituent, (3) a C₁₋₄ alkyl group having a non-aromatic cyclic hydrocarbon group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent, or (4) a C₁₋₄ alkyl group having a non-aromatic heterocyclic group of carbon atoms not greater than 7 having an optionally substituted basic group, and optionally having an additional substituent; R⁴ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; Q¹ represents a C₁₋₄ alkyl group, which may optionally be substituted with a substituent selected from the group consisting of (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, and (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7; Q² represents (1) CH₂, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, (2) NH, which may optionally be substituted with an optionally substituted C₁₋₄ alkyl group with a substituent selected from the group consisting of carbamoyl group and hydroxyl group, or (3) O; Y represents a group represented by formula: —CONH—, —CSNH—, —CH₂NH—, —NHCO—, —CH₂O—, —CH₂S—, —COO—, —CSO—, —CH₂CH₂—, or —CH═CH—, which may optionally be substituted with a C₁₋₆ alkyl group; and, Z⁹ represents hydrogen atom, O or S; and, P and P′, which may be the same or different, each may form a ring by combining P and P′ or P and Q¹ together and represents: (1) hydrogen atom; (2) an optional amino acid residue continuously or discontinuously bound from the C terminus of the 1-48 amino acid sequence in the amino acid sequence represented by SEQ ID NO: 1; (3) a group represented by formula: J¹-J²-C(J³)(Q³)Y¹C(J⁴)(Q⁴)Y²C(J⁵)(Q⁵)Y³C(J⁶)(Q⁶)C(=Z¹¹)- (wherein: J¹ represents (a) hydrogen atom or (b) (i) a C₁₋₁₅ acyl group, (ii) a C₁₋₁₅ alkyl group, (iii) a C₆₋₁₄ aryl group, (iv) carbamoyl group, (v) carboxyl group, (vi) sulfino group, (vii) amidino group, (viii) glyoxyloyl group or (ix) amino group, which groups may optionally be substituted with a substituent containing an optionally substituted cyclic group; J² represents (1) NH optionally substituted with a C₁₋₆ alkyl group, (2) CH₂ optionally substituted with a C₁₋₆ alkyl group, (3) O or (4) S; J³ through J⁶ each represents hydrogen atom or a C₁₋₃ alkyl group; Q³ through Q⁶ each represents a C₁₋₄ alkyl group, which may optionally have a substituent selected from the group consisting of: (1) an optionally substituted C₆₋₁₂ aromatic hydrocarbon group, (2) an optionally substituted 5- to 14-membered aromatic heterocyclic group consisting of 1 to 7 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (3) an optionally substituted C₈₋₁₄ aromatic fused cyclic group, (4) an optionally substituted 5- to 14-membered aromatic fused heterocyclic group consisting of 3 to 11 carbon atoms and hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur atoms, (5) an optionally substituted non-aromatic cyclic hydrocarbon group having carbon atoms not greater than 7, (6) an optionally substituted non-aromatic heterocyclic group having carbon atoms not greater than 7, (7) an optionally substituted amino group, (8) an optionally substituted guanidino group, (9) an optionally substituted hydroxyl group, (10) an optionally substituted carboxyl group, (11) an optionally substituted carbamoyl group, and (12) an optionally substituted sulfhydryl group, or hydrogen atom; J³ and Q³, J⁴ and Q⁴, J⁵ and Q⁵ or J⁶ and Q⁶ may be combined together, or, Z¹ and R¹, J² and Q³, Y¹ and Q⁴, Y² and Q⁵, or Y³ and Q⁶ may be combined together, to form a ring; Y¹ through Y³ each represents a group represented by formula: —CON(J¹³)-, —CSN(J¹³)-, —C(J¹⁴)N(J¹³)- or —N(J¹³)CO— (wherein J¹³ and J¹⁴ each represents hydrogen atom or a C₁₋₃ alkyl group); and, Z¹⁰ represents hydrogen atom, O or S); (4) a group represented by formula: J¹-J²-C(J⁷)(Q⁷)Y²C(J⁸)(Q⁸)Y³C(J⁹)(Q⁹)C(=Z¹⁰)- (wherein: J¹ and J², each has the same significance as described above; J⁷ through J⁹ have the same significance as for J³; Q⁷ through Q⁹ have the same significance as for Q³; Y² and Y³ each has the same significance as described above; Z¹⁰ has the same significance as described above; J⁷ and Q⁷, J⁸ and Q⁸ or J⁹ and Q⁹ may be combined together, or, J² and Q⁷, Y² and Q⁸ or Y³ and Q⁹ may be combined together, to form a ring); (5) a group represented by formula: J¹-J²-C(J¹⁰)(Q¹⁰)Y³C(J¹¹)(Q¹¹)C(=Z¹⁰)- (wherein: J¹ and J² have the same significance as described above represents; J¹⁰ and J¹¹ have the same significance as for J³; Q¹⁰ and Q¹¹ have the same significance as for Q³; Y³ has the same significance as described above; Z¹⁰ has the same significance as described above; and, J¹⁰ and Q¹⁰ or J¹¹ and Q¹¹ may be combined together, or J² and Q¹⁰ or Y³ and Q¹¹ may be combined together, to form a ring); (6) a group represented by formula: J¹-J²-C(J¹²)²)(Q¹²)C(=Z¹⁰)- (wherein; J¹ and J² have the same significance as described above; J¹² has the same significance as for J³; Q¹² has the same significance as for Q³; Z¹⁰ has the same significance as described above; and J¹² and Q¹² may be combined together, or J² and Q¹² may be combined together, to form a ring); or, (7) a group represented by formula: J¹- (wherein J¹ has the same significance as described above)] or a salt thereof, or a prodrug thereof.
 34. The agent according to claim 33, wherein the metastin derivative (III) is the metastin derivative (II) according to claim
 1. 35. The agent according to claim 33, wherein V′ is a group represented by formula:

(wherein each symbol has the same significance as defined in claim 33).
 36. The agent according to claim 33, wherein V′ is a group represented by formula:

(wherein each symbol has the same significance as defined in claim 33).
 37. The agent according to claim 33, wherein V′ is a group represented by formula:

(wherein each symbol has the same significance as defined in claim 33).
 38. The agent according to claims 33 to 37, which is a down-regulating agent for gonadotropic hormone or sex hormone.
 39. The agent according to claims 33 to 37, which is a down-regulating agent for human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO:
 9. 40. The agent according to claims 33 to 39, which is an agent for preventing or treating hormone-dependent cancer.
 41. A method for suppressing gonadotropic hormone secretion or suppressing sex hormone secretion, which comprises administering to a mammal an effective dose of the metastin derivative (III) according to claim 33 or a salt thereof, or a prodrug thereof.
 42. A method for down regulating gonadotropic hormone or sex hormone, which comprises administering to a mammal an effective dose of the metastin derivative according to claim 33 or a salt thereof, or a prodrug thereof.
 43. A method for down regulating human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO: 9, which comprises administering to a mammal an effective dose of the metastin derivative according to claim 33 or a salt thereof, or a prodrug thereof.
 44. A method for preventing or treating hormone-dependent cancer, which comprises administering to a mammal an effective dose of the metastin derivative according to claim 33 or a salt thereof, or a prodrug thereof.
 45. Use of the metastin derivative according to claim 33 or a salt thereof, or a prodrug thereof to manufacture an agent for suppressing gonadotropic hormone secretion or an agent for suppressing sex hormone secretion.
 46. Use of the metastin derivative according to claim 33 or a salt thereof, or a prodrug thereof to manufacture a down-regulating agent for gonadotropic hormone or sex hormone.
 47. Use of the metastin derivative according to claim 33 or a salt thereof, or a prodrug thereof to manufacture a down-regulating agent for human OT7T175 (metastin receptor) protein consisting of the amino acid sequence represented by SEQ ID NO:
 9. 48. Use of the metastin derivative according to claim 33 or a salt thereof, or a prodrug thereof to manufacture an agent for preventing or treating hormone-dependent cancer.
 49. A metastin derivative represented by formula: XX0-XX2-XX3-XX4-XX5-XX6-AzaGly-XX8-XX9-XX10-NH₂ (wherein: XX0 represents formyl, C₁₋₆ alkanoyl, cyclopropanecarbonyl, 6-(acetyl-D-arginylamino)caproyl, 6-((R)-2,3-diaminopropionylamino)caproyl, 6-(D-norleucylamino)caproyl, 4-(D-arginylamino)butyryl, 3-(4-Hydroxyphenyl)propionyl, glycyl, tyrosyl, acetylglycyl, acetyltyrosyl, D-tyrosyl, acetyl-D-tyrosyl, pyroglutamyl, 3-(pyridine-3-yl)propionyl, adipoyl or 6-aminocaproyl; XX2 represents Tyr, D-Tyr, D-Ala, D-Leu, D-Phe, D-Lys, D-Trp or bond arm; XX3 represents Trp, Pro, 4-pyridylalanine, Tic, D-Trp, D-Ala, D-Leu, D-Phe, D-Lys, D-Glu, D-2-pyridylalanine, D-3-pyridylalanine or D-4-pyridylalanine; XX4 represents Asn, 2-amino-3-ureidopropion acid, N^(β)-formyldiaminopropionic acid or N^(β)-acetyldiaminopropionic acid; XX5 represents Ser, Thr or Val; XX6 represents Phe, Tyr, Trp, Tyr(Me), Thi, Nal(2), Cha, 4-pyridylalanine or 4-fluorophenylalanine; AzaGly represents azaglycine; XX8 represents Leu, Nva or Val; XX9 represents Arg, Om, Arg(Me) or Arg(symMe2); XX10 represents Phe, Trp, 2-naphthylalanine, 2-thienylalanine, tyrosine or 4-fluorophenylalanine), or a salt thereof.
 50. D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 305), D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 385), D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 501), Benzoyl-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 509), D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 512), Ac-D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 516), D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 540), D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 541), Benzoyl-Asn-Ser-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 545), D-Tyr-D-Pya(4)-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-PheΨ(CSNH)NH₂ (Compound No. 548), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 550), Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 551), D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 552), D-Nle-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 553), D-Arg-γ-Abu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 555), Ac-D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 558), 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 559), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 562), Ac-D-Tyr-D-Trp-Asn-Val-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 564), Cyclopropanecarbonyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 566), Butyryl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 567), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 571), Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 579), Ac-D-Tyr-D-Trp-Asn-Ser(Me)-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 580), Ac-D-Tyr-D-Trp-Dap(Ac)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 584), Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 585), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)—NH₂ (Compound No. 589), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Thi-NH₂ (Compound No. 590), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Tyr-NH₂ (Compound No. 591), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ (Compound No. 592), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Om-Trp-NH₂ (Compound No. 599), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg-Trp-NH₂ (Compound No. 600), Ac-D-NMeTyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 602), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(symMe2)-Trp-NH₂ (Compound No. 608), For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 612), Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 613), Ac-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 615), Ac-D-Ala-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 616), Ac-D-Leu-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 617), Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 618), Ac-D-Lys-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 621), Ac-D-Tyr-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 623), Ac-D-Tyr-D-Ala-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 625)□ Ac-D-Tyr-D-Leu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 626), Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 627), Ac-D-Tyr-D-Lys-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 629), Ac-D-Tyr-D-Glu-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 630), Ac-D-Tyr-D-Trp-Asn-Thr-Pya(4)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 635), Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 637), Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 638), Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Val-Arg(Me)-Trp-NH₂ (Compound No. 642), Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 648), Ac-Gly-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 649), D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 650), Ac-D-Tyr-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 651), pGlu-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 652), Ac-D-Tyr-Pro-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 657), Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 658), Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 660), Ac-D-Tyr-Tic-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 662), Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 663), Ac-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 666), Hexanoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 667), 3-Pyridinepropionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 670), Adipoyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 671), Ac-D-Tyr-NMeTrp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 672), 6-Aminocaproyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 674), or salts thereof.
 51. Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 550) or salts thereof, Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 551) or salts thereof, D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 552) or salts thereof, Ac-D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 558) or salts thereof, 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 559) or salts thereof, Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 562) or salts thereof, Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe-NH₂ (Compound No. 571) or salts thereof, Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 579) or salts thereof, Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 585) or salts thereof, Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)—NH₂ (Compound No. 589) or salts thereof, Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ (Compound No. 592) or salts thereof, For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 612) or salts thereof, Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 613) or salts thereof, Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 618) or salts thereof, Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 627) or salts thereof, Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 637) or salts thereof, Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 638) or salts thereof, Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 658) or salts thereof, Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 660) or salts thereof, Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 663), or salts thereof.
 52. A method of enhancing blood stability, which comprises introducing one or two alkyl groups into the side chain of Arg in the Arg-containing peptide.
 53. A method of enhancing blood stability, which comprises introducing one alkyl group into the side chain of Arg in the Arg-containing peptide.
 54. A method of enhancing blood stability, which comprises converting the side chain of Arg in the Arg-containing peptide to N^(ω)-alkylated Arg.
 55. The method according to claims 52 through 54, wherein an alkyl group is a C₁₋₄ alkyl group.
 56. The method according to claims 52 through 54, wherein an alkyl group is a methyl group.
 57. The method according to claims 52 through 54, wherein an Arg-containing peptide is a peptide having a partial peptide characterized by the structure -Arg-XXX-, wherein XXX represents an amino acid having optionally substituted aromatic ring group into the side chain.
 58. The method according to claim 57, wherein XXX is Phe, Trp or Tyr.
 59. Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 550) or salts thereof.
 60. Ac-D-Arg-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 551) or salts thereof.
 61. D-Dap-Acp-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 552) or salts thereof.
 62. Ac-D-Tyr-D-Trp-Asn-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 558) or salts thereof.
 63. 3-(4-Hydroxyphenyl)propionyl-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 559) or salts thereof.
 64. Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 562) or salts thereof.
 65. Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 571) or salts thereof.
 66. Ac-D-Tyr-D-Trp-Alb-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 579) or salts thereof.
 67. Ac-D-Tyr-D-Trp-Dap(For)-Ser-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 585) or salts thereof.
 68. Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Nal(2)—NH₂ (Compound No. 589) or salts thereof.
 69. Ac-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Phe(4F)-NH₂ (Compound No. 592) or salts thereof.
 70. For-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 612) or salts thereof.
 71. Propionyl-D-Tyr-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 613) or salts thereof.
 72. Ac-D-Phe-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 618) or salts thereof.
 73. Ac-D-Tyr-D-Phe-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 627) or salts thereof.
 74. Ac-D-Tyr-D-Trp-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 637) or salts thereof.
 75. Ac-D-Tyr-D-Pya(4)-Asn-Thr-Phe(4F)-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 638) or salts thereof.
 76. Ac-D-Tyr-D-Pya(2)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 658) or salts thereof.
 77. Ac-D-Tyr-D-Pya(3)-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 660) or salts thereof.
 78. Ac-D-Trp-D-Trp-Asn-Thr-Phe-AzaGly-Leu-Arg(Me)-Trp-NH₂ (Compound No. 663) or salts thereof. 